672521131 has 8 divisors (see below), whose sum is σ = 708155280. Its totient is φ = 636910848.

The previous prime is 672521089. The next prime is 672521137. The reversal of 672521131 is 131125276.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672521131 is a prime.

It is a super-2 number, since 2×672521131² = 904569343283038322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 672521131.

It is not an unprimeable number, because it can be changed into a prime (672521137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104355 + ... + 110611.

It is an arithmetic number, because the mean of its divisors is an integer number (88519410).

Almost surely, 2^672521131 is an apocalyptic number.

672521131 is a deficient number, since it is larger than the sum of its proper divisors (35634149).

672521131 is a wasteful number, since it uses less digits than its factorization.

672521131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933.

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

The square root of 672521131 is about 25933.0123780482. The cubic root of 672521131 is about 876.1301884412.

The spelling of 672521131 in words is "six hundred seventy-two million, five hundred twenty-one thousand, one hundred thirty-one".