1256061612 has 24 divisors (see below), whose sum is σ = 3156257776. Its totient is φ = 386480448.

The previous prime is 1256061593. The next prime is 1256061613. The reversal of 1256061612 is 2161606521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256061612.

It is not an unprimeable number, because it can be changed into a prime (1256061613) 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 7 ways as a sum of consecutive naturals, for example, 4025683 + ... + 4025994.

Almost surely, 2^1256061612 is an apocalyptic number.

1256061612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256061612 is an abundant number, since it is smaller than the sum of its proper divisors (1900196164).

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

1256061612 is a wasteful number, since it uses less digits than its factorization.

1256061612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051697 (or 8051695 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1256061612 is about 35440.9595242567. The cubic root of 1256061612 is about 1078.9557842611.

The spelling of 1256061612 in words is "one billion, two hundred fifty-six million, sixty-one thousand, six hundred twelve".