672945 has 64 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 258048.

The previous prime is 672943. The next prime is 672949. The reversal of 672945 is 549276.

It is not a de Polignac number, because 672945 - 2¹ = 672943 is a prime.

It is an alternating number because its digits alternate between even and odd.

672945 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 672945.

It is not an unprimeable number, because it can be changed into a prime (672943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23191 + ... + 23219.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁶⁷²⁹⁴⁵ is an apocalyptic number.

672945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

672945 is an abundant number, since it is smaller than the sum of its proper divisors (778575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672945 is a wasteful number, since it uses less digits than its factorization.

672945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74.

The product of its digits is 15120, while the sum is 33.

The square root of 672945 is about 820.3322497623. The cubic root of 672945 is about 87.6314215588.

Adding to 672945 its reverse (549276), we get a palindrome (1222221).

The spelling of 672945 in words is "six hundred seventy-two thousand, nine hundred forty-five".