73124521 has 12 divisors (see below), whose sum is σ = 80540352. Its totient is φ = 66256344.

The previous prime is 73124507. The next prime is 73124539. The reversal of 73124521 is 12542137.

It is a happy number.

It is not a de Polignac number, because 73124521 - 2⁵ = 73124489 is a prime.

It is a super-3 number, since 3×73124521³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73124501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3900 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (6711696).

Almost surely, 2^73124521 is an apocalyptic number.

It is an amenable number.

73124521 is a deficient number, since it is larger than the sum of its proper divisors (7415831).

73124521 is a wasteful number, since it uses less digits than its factorization.

73124521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8868 (or 8849 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 73124521 is about 8551.2876808116. The cubic root of 73124521 is about 418.1714172973.

Adding to 73124521 its reverse (12542137), we get a palindrome (85666658).

It can be divided in two parts, 731 and 24521, that added together give a palindrome (25252).

The spelling of 73124521 in words is "seventy-three million, one hundred twenty-four thousand, five hundred twenty-one".