1256153412 has 24 divisors (see below), whose sum is σ = 2937314016. Its totient is φ = 417819328.

The previous prime is 1256153407. The next prime is 1256153461. The reversal of 1256153412 is 2143516521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256153412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106473 + ... + 117680.

It is an arithmetic number, because the mean of its divisors is an integer number (122388084).

Almost surely, 2^1256153412 is an apocalyptic number.

1256153412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256153412 is an abundant number, since it is smaller than the sum of its proper divisors (1681160604).

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

1256153412 is a wasteful number, since it uses less digits than its factorization.

1256153412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224627 (or 224625 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 1256153412 is about 35442.2546122563. The cubic root of 1256153412 is about 1078.9820689929.

Adding to 1256153412 its reverse (2143516521), we get a palindrome (3399669933).

The spelling of 1256153412 in words is "one billion, two hundred fifty-six million, one hundred fifty-three thousand, four hundred twelve".