1256254425 has 18 divisors (see below), whose sum is σ = 2250091662. Its totient is φ = 670002240.

The previous prime is 1256254421. The next prime is 1256254427. The reversal of 1256254425 is 5244526521.

1256254425 is a `hidden beast` number, since 1 + 2 + 5 + 625 + 4 + 4 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 112529664 + 1143724761 = 10608^2 + 33819^2 .

It is not a de Polignac number, because 1256254425 - 2² = 1256254421 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256254425.

It is not an unprimeable number, because it can be changed into a prime (1256254421) 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 17 ways as a sum of consecutive naturals, for example, 2791452 + ... + 2791901.

Almost surely, 2^1256254425 is an apocalyptic number.

1256254425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256254425 is a deficient number, since it is larger than the sum of its proper divisors (993837237).

1256254425 is a wasteful number, since it uses less digits than its factorization.

1256254425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583369 (or 5583361 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 1256254425 is about 35443.6796199266. The cubic root of 1256254425 is about 1079.0109901670.

The spelling of 1256254425 in words is "one billion, two hundred fifty-six million, two hundred fifty-four thousand, four hundred twenty-five".