672857 has 4 divisors (see below), whose sum is σ = 679140. Its totient is φ = 666576.

The previous prime is 672827. The next prime is 672863. The reversal of 672857 is 758276.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177241 + 495616 = 421^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 672857 - 2¹² = 668761 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 7 + 8⁶ + 2¹⁴ + 5⁸ + 7⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672817) 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, 2978 + ... + 3195.

It is an arithmetic number, because the mean of its divisors is an integer number (169785).

2⁶⁷²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

672857 is a deficient number, since it is larger than the sum of its proper divisors (6283).

672857 is a wasteful number, since it uses less digits than its factorization.

672857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282.

The product of its digits is 23520, while the sum is 35.

The square root of 672857 is about 820.2786112048. The cubic root of 672857 is about 87.6276015828.

The spelling of 672857 in words is "six hundred seventy-two thousand, eight hundred fifty-seven".