672491 has 4 divisors (see below), whose sum is σ = 675312. Its totient is φ = 669672.

The previous prime is 672473. The next prime is 672493. The reversal of 672491 is 194276.

672491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 672491 - 2¹⁰ = 671467 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (168828).

2⁶⁷²⁴⁹¹ is an apocalyptic number.

672491 is a deficient number, since it is larger than the sum of its proper divisors (2821).

672491 is a wasteful number, since it uses less digits than its factorization.

672491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820.

The product of its digits is 3024, while the sum is 29.

The square root of 672491 is about 820.0554859276. The cubic root of 672491 is about 87.6117103810.

The spelling of 672491 in words is "six hundred seventy-two thousand, four hundred ninety-one".