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1220412 = 223101701
BaseRepresentation
bin100101001111100111100
32022000002110
410221330330
5303023122
642054020
713242024
oct4517474
92260073
101220412
11763a06
124aa310
1333964b
1423aa84
1519190c
hex129f3c

1220412 has 12 divisors (see below), whose sum is σ = 2847656. Its totient is φ = 406800.

The previous prime is 1220411. The next prime is 1220423. The reversal of 1220412 is 2140221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 101701 = 1220412 / (1 + 2 + 2 + 0 + 4 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50839 + ... + 50862.

21220412 is an apocalyptic number.

1220412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220412 is an abundant number, since it is smaller than the sum of its proper divisors (1627244).

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

1220412 is a wasteful number, since it uses less digits than its factorization.

1220412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101708 (or 101706 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220412 is about 1104.7225896124. The cubic root of 1220412 is about 106.8649999193.

Adding to 1220412 its reverse (2140221), we get a palindrome (3360633).

The spelling of 1220412 in words is "one million, two hundred twenty thousand, four hundred twelve".

Divisors: 1 2 3 4 6 12 101701 203402 305103 406804 610206 1220412