45021157 has 4 divisors (see below), whose sum is σ = 46119276. Its totient is φ = 43923040.

The previous prime is 45021107. The next prime is 45021161. The reversal of 45021157 is 75112054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10751841 + 34269316 = 3279^2 + 5854^2 .

It is a cyclic number.

It is not a de Polignac number, because 45021157 - 2¹⁵ = 44988389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45021107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548998 + ... + 549079.

It is an arithmetic number, because the mean of its divisors is an integer number (11529819).

Almost surely, 2^45021157 is an apocalyptic number.

It is an amenable number.

45021157 is a deficient number, since it is larger than the sum of its proper divisors (1098119).

45021157 is a wasteful number, since it uses less digits than its factorization.

45021157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098118.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 45021157 is about 6709.7806968633. The cubic root of 45021157 is about 355.7450648202.

The spelling of 45021157 in words is "forty-five million, twenty-one thousand, one hundred fifty-seven".