80724121 has 16 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 75841920.

The previous prime is 80724101. The next prime is 80724187. The reversal of 80724121 is 12142708.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80724121 is a prime.

It is a super-2 number, since 2×80724121² = 13032767422445282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80724101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192450 + ... + 192868.

It is an arithmetic number, because the mean of its divisors is an integer number (5362560).

Almost surely, 2^80724121 is an apocalyptic number.

It is an amenable number.

80724121 is a deficient number, since it is larger than the sum of its proper divisors (5076839).

80724121 is a wasteful number, since it uses less digits than its factorization.

80724121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 80724121 is about 8984.6603163392. The cubic root of 80724121 is about 432.1830946131.

Adding to 80724121 its reverse (12142708), we get a palindrome (92866829).

It can be divided in two parts, 80 and 724121, that added together give a square (724201 = 851²).

The spelling of 80724121 in words is "eighty million, seven hundred twenty-four thousand, one hundred twenty-one".