672157 has 4 divisors (see below), whose sum is σ = 681696. Its totient is φ = 662620.

The previous prime is 672151. The next prime is 672167. The reversal of 672157 is 751276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672157 - 2⁷ = 672029 is a prime.

It is a Duffinian number.

672157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672151) 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, 4663 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (170424).

2⁶⁷²¹⁵⁷ is an apocalyptic number.

It is an amenable number.

672157 is a deficient number, since it is larger than the sum of its proper divisors (9539).

672157 is an equidigital number, since it uses as much as digits as its factorization.

672157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538.

The product of its digits is 2940, while the sum is 28.

The square root of 672157 is about 819.8518158789. The cubic root of 672157 is about 87.5972035415.

The spelling of 672157 in words is "six hundred seventy-two thousand, one hundred fifty-seven".