45021577 has 4 divisors (see below), whose sum is σ = 45040896. Its totient is φ = 45002260.

The previous prime is 45021569. The next prime is 45021589. The reversal of 45021577 is 77512054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77512054 = 2 ⋅38756027.

It is a cyclic number.

It is not a de Polignac number, because 45021577 - 2³ = 45021569 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45021527) 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, 5593 + ... + 11014.

It is an arithmetic number, because the mean of its divisors is an integer number (11260224).

Almost surely, 2^45021577 is an apocalyptic number.

It is an amenable number.

45021577 is a deficient number, since it is larger than the sum of its proper divisors (19319).

45021577 is a wasteful number, since it uses less digits than its factorization.

45021577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19318.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 45021577 is about 6709.8119943855. The cubic root of 45021577 is about 355.7461710591.

The spelling of 45021577 in words is "forty-five million, twenty-one thousand, five hundred seventy-seven".