45307257 has 8 divisors (see below), whose sum is σ = 60651360. Its totient is φ = 30084000.

The previous prime is 45307253. The next prime is 45307259. The reversal of 45307257 is 75270354.

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

It is not a de Polignac number, because 45307257 - 2² = 45307253 is a prime.

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 not an unprimeable number, because it can be changed into a prime (45307253) 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, 29332 + ... + 30837.

It is an arithmetic number, because the mean of its divisors is an integer number (7581420).

Almost surely, 2^45307257 is an apocalyptic number.

It is an amenable number.

45307257 is a deficient number, since it is larger than the sum of its proper divisors (15344103).

45307257 is a wasteful number, since it uses less digits than its factorization.

45307257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60423.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 45307257 is about 6731.0665573890. The cubic root of 45307257 is about 356.4970359210.

The spelling of 45307257 in words is "forty-five million, three hundred seven thousand, two hundred fifty-seven".