45139142 has 4 divisors (see below), whose sum is σ = 67708716. Its totient is φ = 22569570.

The previous prime is 45139141. The next prime is 45139147. The reversal of 45139142 is 24193154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24193154 = 2 ⋅12096577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45139141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11284784 + ... + 11284787.

It is an arithmetic number, because the mean of its divisors is an integer number (16927179).

Almost surely, 2^45139142 is an apocalyptic number.

45139142 is a deficient number, since it is larger than the sum of its proper divisors (22569574).

45139142 is a wasteful number, since it uses less digits than its factorization.

45139142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22569573.

The product of its digits is 4320, while the sum is 29.

The square root of 45139142 is about 6718.5669602974. The cubic root of 45139142 is about 356.0555556525.

It can be divided in two parts, 451 and 39142, that added together give a palindrome (39593).

The spelling of 45139142 in words is "forty-five million, one hundred thirty-nine thousand, one hundred forty-two".