726531 has 12 divisors (see below), whose sum is σ = 1049688. Its totient is φ = 446784.

The previous prime is 726527. The next prime is 726533. The reversal of 726531 is 135627.

It is not a de Polignac number, because 726531 - 2² = 726527 is a prime.

It is a super-2 number, since 2×726531² = 1055694587922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (87474).

2⁷²⁶⁵³¹ is an apocalyptic number.

726531 is a deficient number, since it is larger than the sum of its proper divisors (323157).

726531 is a wasteful number, since it uses less digits than its factorization.

726531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1449 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 726531 is about 852.3678783248. The cubic root of 726531 is about 89.8982801392.

The spelling of 726531 in words is "seven hundred twenty-six thousand, five hundred thirty-one".