1325691 has 6 divisors (see below), whose sum is σ = 1914900. Its totient is φ = 883788.

The previous prime is 1325669. The next prime is 1325693. The reversal of 1325691 is 1965231.

It is not a de Polignac number, because 1325691 - 2⁵ = 1325659 is a prime.

It is a super-3 number, since 3×1325691³ = 6989533301825743113, which contains 333 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1325693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73641 + ... + 73658.

It is an arithmetic number, because the mean of its divisors is an integer number (319150).

2^1325691 is an apocalyptic number.

1325691 is a deficient number, since it is larger than the sum of its proper divisors (589209).

1325691 is a wasteful number, since it uses less digits than its factorization.

1325691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147305 (or 147302 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1325691 is about 1151.3865554192. The cubic root of 1325691 is about 109.8535516692.

It can be divided in two parts, 1325 and 691, that added together give a triangular number (2016 = T₆₃).

The spelling of 1325691 in words is "one million, three hundred twenty-five thousand, six hundred ninety-one".