1213425525 has 48 divisors (see below), whose sum is σ = 2174555264. Its totient is φ = 593498880.

The previous prime is 1213425503. The next prime is 1213425589. The reversal of 1213425525 is 5255243121.

It is not a de Polignac number, because 1213425525 - 2²⁵ = 1179871093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213425492 and 1213425501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149112 + ... + 157038.

Almost surely, 2^1213425525 is an apocalyptic number.

1213425525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213425525 is a deficient number, since it is larger than the sum of its proper divisors (961129739).

1213425525 is a wasteful number, since it uses less digits than its factorization.

1213425525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8110 (or 8105 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 1213425525 is about 34834.2579223385. The cubic root of 1213425525 is about 1066.6068670360.

Adding to 1213425525 its reverse (5255243121), we get a palindrome (6468668646).

The spelling of 1213425525 in words is "one billion, two hundred thirteen million, four hundred twenty-five thousand, five hundred twenty-five".