672745 has 8 divisors (see below), whose sum is σ = 813384. Its totient is φ = 534144.

The previous prime is 672743. The next prime is 672757. The reversal of 672745 is 547276.

672745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 534361 = 372^2 + 731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 672745 - 2¹ = 672743 is a prime.

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

It is a Duffinian number.

672745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (672743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (101673).

2⁶⁷²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

672745 is a deficient number, since it is larger than the sum of its proper divisors (140639).

672745 is a wasteful number, since it uses less digits than its factorization.

672745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 11760, while the sum is 31.

The square root of 672745 is about 820.2103388766. The cubic root of 672745 is about 87.6227393134.

The spelling of 672745 in words is "six hundred seventy-two thousand, seven hundred forty-five".