1315657825 has 12 divisors (see below), whose sum is σ = 1684043008. Its totient is φ = 1018573200.

The previous prime is 1315657823. The next prime is 1315657843. The reversal of 1315657825 is 5287565131.

It is a happy number.

It is not a de Polignac number, because 1315657825 - 2¹ = 1315657823 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1315657823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 848037 + ... + 849586.

Almost surely, 2^1315657825 is an apocalyptic number.

It is an amenable number.

1315657825 is a deficient number, since it is larger than the sum of its proper divisors (368385183).

1315657825 is a wasteful number, since it uses less digits than its factorization.

1315657825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697664 (or 1697659 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The square root of 1315657825 is about 36271.9978082267. The cubic root of 1315657825 is about 1095.7571613873.

The spelling of 1315657825 in words is "one billion, three hundred fifteen million, six hundred fifty-seven thousand, eight hundred twenty-five".