531465 has 16 divisors (see below), whose sum is σ = 927936. Its totient is φ = 257600.

The previous prime is 531457. The next prime is 531481. The reversal of 531465 is 564135.

It is not a de Polignac number, because 531465 - 2³ = 531457 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 11 and base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (57996).

2⁵³¹⁴⁶⁵ is an apocalyptic number.

531465 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531465 is a deficient number, since it is larger than the sum of its proper divisors (396471).

531465 is a wasteful number, since it uses less digits than its factorization.

531465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240.

The product of its digits is 1800, while the sum is 24.

The square root of 531465 is about 729.0164607195. The cubic root of 531465 is about 81.0012193080.

Subtracting from 531465 its sum of digits (24), we obtain a 12-th power (531441 = 3¹²).

The spelling of 531465 in words is "five hundred thirty-one thousand, four hundred sixty-five".