745257 has 16 divisors (see below), whose sum is σ = 1044288. Its totient is φ = 472320.

The previous prime is 745249. The next prime is 745273. The reversal of 745257 is 752547.

It is not a de Polignac number, because 745257 - 2³ = 745249 is a prime.

Its product of digits (9800) is a multiple of the sum of its prime divisors (200).

It is not an unprimeable number, because it can be changed into a prime (745247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8938 + ... + 9020.

It is an arithmetic number, because the mean of its divisors is an integer number (65268).

2⁷⁴⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

745257 is a deficient number, since it is larger than the sum of its proper divisors (299031).

745257 is a wasteful number, since it uses less digits than its factorization.

745257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 9800, while the sum is 30.

The square root of 745257 is about 863.2826883472. The cubic root of 745257 is about 90.6640999730.

The spelling of 745257 in words is "seven hundred forty-five thousand, two hundred fifty-seven".