1311925 has 12 divisors (see below), whose sum is σ = 1646596. Its totient is φ = 1036800.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311925 is 5291131.

It can be written as a sum of positive squares in 6 ways, for example, as 62001 + 1249924 = 249^2 + 1118^2 .

It is not a de Polignac number, because 1311925 - 2¹ = 1311923 is a prime.

It is a super-2 number, since 2×1311925² = 3442294411250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311896 and 1311905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311923) 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, 2155 + ... + 2695.

2^1311925 is an apocalyptic number.

It is an amenable number.

1311925 is a deficient number, since it is larger than the sum of its proper divisors (334671).

1311925 is an equidigital number, since it uses as much as digits as its factorization.

1311925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 643 counting only the distinct ones).

The product of its digits is 270, while the sum is 22.

The square root of 1311925 is about 1145.3929456741. The cubic root of 1311925 is about 109.4719874411.

The spelling of 1311925 in words is "one million, three hundred eleven thousand, nine hundred twenty-five".