1256203212 has 24 divisors (see below), whose sum is σ = 3197608512. Its totient is φ = 380667600.

The previous prime is 1256203211. The next prime is 1256203229. The reversal of 1256203212 is 2123026521.

It is not an unprimeable number, because it can be changed into a prime (1256203211) 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, 4758214 + ... + 4758477.

It is an arithmetic number, because the mean of its divisors is an integer number (133233688).

Almost surely, 2^1256203212 is an apocalyptic number.

1256203212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256203212 is an abundant number, since it is smaller than the sum of its proper divisors (1941405300).

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

1256203212 is a wasteful number, since it uses less digits than its factorization.

1256203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516709 (or 9516707 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1256203212 is about 35442.9571565353. The cubic root of 1256203212 is about 1078.9963274947.

Adding to 1256203212 its reverse (2123026521), we get a palindrome (3379229733).

The spelling of 1256203212 in words is "one billion, two hundred fifty-six million, two hundred three thousand, two hundred twelve".