80945121 has 8 divisors (see below), whose sum is σ = 108703840. Its totient is φ = 53574912.

The previous prime is 80945113. The next prime is 80945129. The reversal of 80945121 is 12154908.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80945113) and next prime (80945129).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80945121 - 2³ = 80945113 is a prime.

It is a super-2 number, since 2×80945121² = 13104225227409282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80945129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96640 + ... + 97473.

It is an arithmetic number, because the mean of its divisors is an integer number (13587980).

Almost surely, 2^80945121 is an apocalyptic number.

It is an amenable number.

80945121 is a deficient number, since it is larger than the sum of its proper divisors (27758719).

80945121 is a wasteful number, since it uses less digits than its factorization.

80945121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194255.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 80945121 is about 8996.9506500814. The cubic root of 80945121 is about 432.5771339368.

The spelling of 80945121 in words is "eighty million, nine hundred forty-five thousand, one hundred twenty-one".