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1212401412 = 223390712377
BaseRepresentation
bin100100001000011…
…1100011100000100
310010111100101002000
41020100330130010
54440333321122
6320145545300
742021145665
oct11020743404
93114311060
101212401412
11572407142
1229a045230
131642470b1
14b703b36c
157168a0ac
hex4843c704

1212401412 has 48 divisors (see below), whose sum is σ = 3146982720. Its totient is φ = 403655616.

The previous prime is 1212401401. The next prime is 1212401417. The reversal of 1212401412 is 2141042121.

Adding to 1212401412 its reverse (2141042121), we get a palindrome (3353443533).

1212401412 is a `hidden beast` number, since 1 + 212 + 40 + 1 + 412 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1212401417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91768 + ... + 104144.

It is an arithmetic number, because the mean of its divisors is an integer number (65562140).

Almost surely, 21212401412 is an apocalyptic number.

1212401412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212401412 is an abundant number, since it is smaller than the sum of its proper divisors (1934581308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212401412 is a wasteful number, since it uses less digits than its factorization.

1212401412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13297 (or 13289 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1212401412 is about 34819.5550230040. Note that the first 3 decimals coincide. The cubic root of 1212401412 is about 1066.3067158298.

The spelling of 1212401412 in words is "one billion, two hundred twelve million, four hundred one thousand, four hundred twelve".