45732521 has 4 divisors (see below), whose sum is σ = 46796112. Its totient is φ = 44668932.

The previous prime is 45732473. The next prime is 45732553. The reversal of 45732521 is 12523754.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12523754 = 2 ⋅6261877.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45732521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45732571) 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, 531731 + ... + 531816.

It is an arithmetic number, because the mean of its divisors is an integer number (11699028).

Almost surely, 2^45732521 is an apocalyptic number.

It is an amenable number.

45732521 is a deficient number, since it is larger than the sum of its proper divisors (1063591).

45732521 is a wasteful number, since it uses less digits than its factorization.

45732521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063590.

The product of its digits is 8400, while the sum is 29.

The square root of 45732521 is about 6762.5824209395. The cubic root of 45732521 is about 357.6089510953.

The spelling of 45732521 in words is "forty-five million, seven hundred thirty-two thousand, five hundred twenty-one".