45421257 has 16 divisors (see below), whose sum is σ = 70163840. Its totient is φ = 25598592.

The previous prime is 45421241. The next prime is 45421261. The reversal of 45421257 is 75212454.

It is not a de Polignac number, because 45421257 - 2⁴ = 45421241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45421357) 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, 13282 + ... + 16347.

It is an arithmetic number, because the mean of its divisors is an integer number (4385240).

Almost surely, 2^45421257 is an apocalyptic number.

It is an amenable number.

45421257 is a deficient number, since it is larger than the sum of its proper divisors (24742583).

45421257 is a wasteful number, since it uses less digits than its factorization.

45421257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29712.

The product of its digits is 11200, while the sum is 30.

The square root of 45421257 is about 6739.5294346119. The cubic root of 45421257 is about 356.7957858808.

The spelling of 45421257 in words is "forty-five million, four hundred twenty-one thousand, two hundred fifty-seven".