625749 has 8 divisors (see below), whose sum is σ = 840000. Its totient is φ = 414336.

The previous prime is 625699. The next prime is 625763. The reversal of 625749 is 947526.

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

It is not a de Polignac number, because 625749 - 2⁷ = 625621 is a prime.

It is a super-2 number, since 2×625749² = 783123622002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625789) 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, 124 + ... + 1125.

It is an arithmetic number, because the mean of its divisors is an integer number (105000).

2⁶²⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

625749 is a deficient number, since it is larger than the sum of its proper divisors (214251).

625749 is a wasteful number, since it uses less digits than its factorization.

625749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419.

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

The square root of 625749 is about 791.0429823973. The cubic root of 625749 is about 85.5329376191.

The spelling of 625749 in words is "six hundred twenty-five thousand, seven hundred forty-nine".