45742521 has 16 divisors (see below), whose sum is σ = 66836160. Its totient is φ = 27597120.

The previous prime is 45742517. The next prime is 45742547. The reversal of 45742521 is 12524754.

It is not a de Polignac number, because 45742521 - 2² = 45742517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45742321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4531 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (4177260).

Almost surely, 2^45742521 is an apocalyptic number.

It is an amenable number.

45742521 is a deficient number, since it is larger than the sum of its proper divisors (21093639).

45742521 is a wasteful number, since it uses less digits than its factorization.

45742521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296.

The product of its digits is 11200, while the sum is 30.

The square root of 45742521 is about 6763.3217430490. The cubic root of 45742521 is about 357.6350144510.

It can be divided in two parts, 457425 and 21, that added together give a triangular number (457446 = T₉₅₆).

The spelling of 45742521 in words is "forty-five million, seven hundred forty-two thousand, five hundred twenty-one".