45042281 has 4 divisors (see below), whose sum is σ = 45078672. Its totient is φ = 45005892.

The previous prime is 45042269. The next prime is 45042323. The reversal of 45042281 is 18224054.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 45042281 - 2¹⁰ = 45041257 is a prime.

It is a super-2 number, since 2×45042281² = 4057614155365922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45042281.

It is not an unprimeable number, because it can be changed into a prime (45042251) 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, 16271 + ... + 18836.

It is an arithmetic number, because the mean of its divisors is an integer number (11269668).

Almost surely, 2^45042281 is an apocalyptic number.

It is an amenable number.

45042281 is a deficient number, since it is larger than the sum of its proper divisors (36391).

45042281 is a wasteful number, since it uses less digits than its factorization.

45042281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36390.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 45042281 is about 6711.3546322631. The cubic root of 45042281 is about 355.8006948413.

The spelling of 45042281 in words is "forty-five million, forty-two thousand, two hundred eighty-one".