45402139 has 4 divisors (see below), whose sum is σ = 46967760. Its totient is φ = 43836520.

The previous prime is 45402103. The next prime is 45402143. The reversal of 45402139 is 93120454.

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

It is a cyclic number.

It is not a de Polignac number, because 45402139 - 2¹³ = 45393947 is a prime.

It is a super-2 number, since 2×45402139² = 4122708451550642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45402179) 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, 782767 + ... + 782824.

It is an arithmetic number, because the mean of its divisors is an integer number (11741940).

Almost surely, 2^45402139 is an apocalyptic number.

45402139 is a deficient number, since it is larger than the sum of its proper divisors (1565621).

45402139 is a wasteful number, since it uses less digits than its factorization.

45402139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565620.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 45402139 is about 6738.1109370505. The cubic root of 45402139 is about 356.7457199019.

The spelling of 45402139 in words is "forty-five million, four hundred two thousand, one hundred thirty-nine".