262631 has 4 divisors (see below), whose sum is σ = 264264. Its totient is φ = 261000.

The previous prime is 262627. The next prime is 262643. The reversal of 262631 is 136262.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 262631 - 2² = 262627 is a prime.

It is a super-2 number, since 2×262631² = 137950084322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262621) 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, 545 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (66066).

2²⁶²⁶³¹ is an apocalyptic number.

262631 is a deficient number, since it is larger than the sum of its proper divisors (1633).

262631 is a wasteful number, since it uses less digits than its factorization.

262631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

The product of its digits is 432, while the sum is 20.

The square root of 262631 is about 512.4753652616. The cubic root of 262631 is about 64.0396076444.

Adding to 262631 its reverse (136262), we get a palindrome (398893).

It can be divided in two parts, 2626 and 31, that multiplied together give a triangular number (81406 = T₄₀₃).

The spelling of 262631 in words is "two hundred sixty-two thousand, six hundred thirty-one".