1256425203 has 32 divisors (see below), whose sum is σ = 1895880960. Its totient is φ = 733138560.

The previous prime is 1256425201. The next prime is 1256425207. The reversal of 1256425203 is 3025246521.

It is not a de Polignac number, because 1256425203 - 2¹ = 1256425201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256425201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378276 + ... + 381582.

It is an arithmetic number, because the mean of its divisors is an integer number (59246280).

Almost surely, 2^1256425203 is an apocalyptic number.

1256425203 is a deficient number, since it is larger than the sum of its proper divisors (639455757).

1256425203 is a wasteful number, since it uses less digits than its factorization.

1256425203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1256425203 is about 35446.0886840847. The cubic root of 1256425203 is about 1079.0598823303.

The spelling of 1256425203 in words is "one billion, two hundred fifty-six million, four hundred twenty-five thousand, two hundred three".