1965531 has 8 divisors (see below), whose sum is σ = 2758720. Its totient is φ = 1241352.

The previous prime is 1965527. The next prime is 1965541. The reversal of 1965531 is 1355691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1965531 - 2² = 1965527 is a prime.

It is a super-2 number, since 2×1965531² = 7726624223922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17185 + ... + 17298.

It is an arithmetic number, because the mean of its divisors is an integer number (344840).

2^1965531 is an apocalyptic number.

1965531 is a deficient number, since it is larger than the sum of its proper divisors (793189).

1965531 is a wasteful number, since it uses less digits than its factorization.

1965531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34505.

The product of its digits is 4050, while the sum is 30.

The square root of 1965531 is about 1401.9739655215. The cubic root of 1965531 is about 125.2641029375.

The spelling of 1965531 in words is "one million, nine hundred sixty-five thousand, five hundred thirty-one".