72980121 has 24 divisors (see below), whose sum is σ = 104119680. Its totient is φ = 45455904.

The previous prime is 72980101. The next prime is 72980137. The reversal of 72980121 is 12108927.

It is not a de Polignac number, because 72980121 - 2⁹ = 72979609 is a prime.

It is a super-2 number, since 2×72980121² = 10652196122349282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72980101) 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 23 ways as a sum of consecutive naturals, for example, 85131 + ... + 85983.

It is an arithmetic number, because the mean of its divisors is an integer number (4338320).

Almost surely, 2^72980121 is an apocalyptic number.

It is an amenable number.

72980121 is a deficient number, since it is larger than the sum of its proper divisors (31139559).

72980121 is a wasteful number, since it uses less digits than its factorization.

72980121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 72980121 is about 8542.8403356261. The cubic root of 72980121 is about 417.8959796261.

The spelling of 72980121 in words is "seventy-two million, nine hundred eighty thousand, one hundred twenty-one".