1256342412 has 24 divisors (see below), whose sum is σ = 3156963376. Its totient is φ = 386566848.

The previous prime is 1256342411. The next prime is 1256342429. The reversal of 1256342412 is 2142436521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256342412.

It is not an unprimeable number, because it can be changed into a prime (1256342411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4026583 + ... + 4026894.

Almost surely, 2^1256342412 is an apocalyptic number.

1256342412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256342412 is an abundant number, since it is smaller than the sum of its proper divisors (1900620964).

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

1256342412 is a wasteful number, since it uses less digits than its factorization.

1256342412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053497 (or 8053495 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 1256342412 is about 35444.9208209018. The cubic root of 1256342412 is about 1079.0361805854.

Adding to 1256342412 its reverse (2142436521), we get a palindrome (3398778933).

The spelling of 1256342412 in words is "one billion, two hundred fifty-six million, three hundred forty-two thousand, four hundred twelve".