491572 has 12 divisors (see below), whose sum is σ = 910980. Its totient is φ = 231296.

The previous prime is 491539. The next prime is 491581. The reversal of 491572 is 275194.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 456976 + 34596 = 676^2 + 186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 491572.

It is a congruent number.

It is an unprimeable number.

491572 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 3547 + ... + 3682.

It is an arithmetic number, because the mean of its divisors is an integer number (75915).

2⁴⁹¹⁵⁷² is an apocalyptic number.

It is an amenable number.

491572 is a deficient number, since it is larger than the sum of its proper divisors (419408).

491572 is a wasteful number, since it uses less digits than its factorization.

491572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7250 (or 7248 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 491572 is about 701.1219580073. The cubic root of 491572 is about 78.9215693323.

It can be divided in two parts, 49 and 1572, that multiplied together give a triangular number (77028 = T₃₉₂).

The spelling of 491572 in words is "four hundred ninety-one thousand, five hundred seventy-two".