1311025125 has 32 divisors (see below), whose sum is σ = 2309883264. Its totient is φ = 658080000.

The previous prime is 1311025103. The next prime is 1311025141. The reversal of 1311025125 is 5215201131.

It is not a de Polignac number, because 1311025125 - 2⁷ = 1311024997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96451 + ... + 109200.

It is an arithmetic number, because the mean of its divisors is an integer number (72183852).

Almost surely, 2^1311025125 is an apocalyptic number.

1311025125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311025125 is a deficient number, since it is larger than the sum of its proper divisors (998858139).

1311025125 is a wasteful number, since it uses less digits than its factorization.

1311025125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205686 (or 205676 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1311025125 is about 36208.0809350620. The cubic root of 1311025125 is about 1094.4695205751.

Adding to 1311025125 its reverse (5215201131), we get a palindrome (6526226256).

The spelling of 1311025125 in words is "one billion, three hundred eleven million, twenty-five thousand, one hundred twenty-five".