672136 has 8 divisors (see below), whose sum is σ = 1260270. Its totient is φ = 336064.

The previous prime is 672131. The next prime is 672137. The reversal of 672136 is 631276.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 22500 = 806^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 672136.

It is not an unprimeable number, because it can be changed into a prime (672131) by changing a digit.

672136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42001 + ... + 42016.

2⁶⁷²¹³⁶ is an apocalyptic number.

It is an amenable number.

672136 is a deficient number, since it is larger than the sum of its proper divisors (588134).

672136 is a wasteful number, since it uses less digits than its factorization.

672136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84023 (or 84019 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 672136 is about 819.8390085864. The cubic root of 672136 is about 87.5962912742.

It can be divided in two parts, 672 and 136, that added together give a palindrome (808).

The spelling of 672136 in words is "six hundred seventy-two thousand, one hundred thirty-six".