672557 has 2 divisors, whose sum is σ = 672558. Its totient is φ = 672556.

The previous prime is 672521. The next prime is 672577. The reversal of 672557 is 755276.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561001 + 111556 = 749^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 672557 - 2⁶ = 672493 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336278 + 336279.

It is an arithmetic number, because the mean of its divisors is an integer number (336279).

2⁶⁷²⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

672557 is a deficient number, since it is larger than the sum of its proper divisors (1).

672557 is an equidigital number, since it uses as much as digits as its factorization.

672557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 32.

The square root of 672557 is about 820.0957261198. The cubic root of 672557 is about 87.6145764336.

The spelling of 672557 in words is "six hundred seventy-two thousand, five hundred fifty-seven".