1256191325 has 12 divisors (see below), whose sum is σ = 1590820800. Its totient is φ = 983570160.

The previous prime is 1256191303. The next prime is 1256191351. The reversal of 1256191325 is 5231916521.

It is a de Polignac number, because none of the positive numbers 2^k-1256191325 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533375 + ... + 535724.

It is an arithmetic number, because the mean of its divisors is an integer number (132568400).

Almost surely, 2^1256191325 is an apocalyptic number.

It is an amenable number.

1256191325 is a deficient number, since it is larger than the sum of its proper divisors (334629475).

1256191325 is a wasteful number, since it uses less digits than its factorization.

1256191325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069156 (or 1069151 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 1256191325 is about 35442.7894641491. The cubic root of 1256191325 is about 1078.9929240990.

The spelling of 1256191325 in words is "one billion, two hundred fifty-six million, one hundred ninety-one thousand, three hundred twenty-five".