45721142 has 4 divisors (see below), whose sum is σ = 68581716. Its totient is φ = 22860570.

The previous prime is 45721133. The next prime is 45721153. The reversal of 45721142 is 24112754.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11430284 + ... + 11430287.

It is an arithmetic number, because the mean of its divisors is an integer number (17145429).

Almost surely, 2^45721142 is an apocalyptic number.

45721142 is a deficient number, since it is larger than the sum of its proper divisors (22860574).

45721142 is a wasteful number, since it uses less digits than its factorization.

45721142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22860573.

The product of its digits is 2240, while the sum is 26.

The square root of 45721142 is about 6761.7410479846. The cubic root of 45721142 is about 357.5792889810.

Adding to 45721142 its reverse (24112754), we get a palindrome (69833896).

The spelling of 45721142 in words is "forty-five million, seven hundred twenty-one thousand, one hundred forty-two".