691272 has 24 divisors (see below), whose sum is σ = 1872390. Its totient is φ = 230400.

The previous prime is 691267. The next prime is 691289. The reversal of 691272 is 272196.

It can be written as a sum of positive squares in only one way, i.e., 509796 + 181476 = 714^2 + 426^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4729 + ... + 4872.

2⁶⁹¹²⁷² is an apocalyptic number.

It is an amenable number.

691272 is an abundant number, since it is smaller than the sum of its proper divisors (1181118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691272 is a wasteful number, since it uses less digits than its factorization.

691272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613 (or 9606 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 691272 is about 831.4276877757. The cubic root of 691272 is about 88.4198258870.

The spelling of 691272 in words is "six hundred ninety-one thousand, two hundred seventy-two".