691252 has 12 divisors (see below), whose sum is σ = 1229956. Its totient is φ = 339840.

The previous prime is 691241. The next prime is 691267. The reversal of 691252 is 252196.

It can be written as a sum of positive squares in 2 ways, for example, as 119716 + 571536 = 346^2 + 756^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

691252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173 + ... + 1660.

2⁶⁹¹²⁵² is an apocalyptic number.

It is an amenable number.

691252 is a deficient number, since it is larger than the sum of its proper divisors (538704).

691252 is a wasteful number, since it uses less digits than its factorization.

691252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2896 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 691252 is about 831.4156601845. The cubic root of 691252 is about 88.4189731529.

The spelling of 691252 in words is "six hundred ninety-one thousand, two hundred fifty-two".