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1206302421 = 3402100807
BaseRepresentation
bin100011111100110…
…1011011011010101
310010001212111211110
41013321223123111
54432303134141
6315411125233
741615254452
oct10771533325
93101774743
101206302421
11569a20955
12297ba3819
13162bc001c
14b62d0829
1570d82e16
hex47e6b6d5

1206302421 has 4 divisors (see below), whose sum is σ = 1608403232. Its totient is φ = 804201612.

The previous prime is 1206302407. The next prime is 1206302431. The reversal of 1206302421 is 1242036021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1206302421 - 226 = 1139193557 is a prime.

It is a super-2 number, since 2×12063024212 = 2910331061820922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206302401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201050401 + ... + 201050406.

It is an arithmetic number, because the mean of its divisors is an integer number (402100808).

Almost surely, 21206302421 is an apocalyptic number.

It is an amenable number.

1206302421 is a deficient number, since it is larger than the sum of its proper divisors (402100811).

1206302421 is an equidigital number, since it uses as much as digits as its factorization.

1206302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402100810.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1206302421 is about 34731.8646346550. The cubic root of 1206302421 is about 1064.5156888928.

Adding to 1206302421 its reverse (1242036021), we get a palindrome (2448338442).

The spelling of 1206302421 in words is "one billion, two hundred six million, three hundred two thousand, four hundred twenty-one".

Divisors: 1 3 402100807 1206302421