1325531 has 4 divisors (see below), whose sum is σ = 1331064. Its totient is φ = 1320000.

The previous prime is 1325521. The next prime is 1325543. The reversal of 1325531 is 1355231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355231 = 43 ⋅31517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325531 is a prime.

It is a super-2 number, since 2×1325531² = 3514064863922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390 + ... + 2891.

It is an arithmetic number, because the mean of its divisors is an integer number (332766).

2^1325531 is an apocalyptic number.

1325531 is a deficient number, since it is larger than the sum of its proper divisors (5533).

1325531 is an equidigital number, since it uses as much as digits as its factorization.

1325531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532.

The product of its digits is 450, while the sum is 20.

The square root of 1325531 is about 1151.3170718790. The cubic root of 1325531 is about 109.8491320180.

The spelling of 1325531 in words is "one million, three hundred twenty-five thousand, five hundred thirty-one".