80981245 has 4 divisors (see below), whose sum is σ = 97177500. Its totient is φ = 64784992.

The previous prime is 80981239. The next prime is 80981267. The reversal of 80981245 is 54218908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57108249 + 23872996 = 7557^2 + 4886^2 .

It is a cyclic number.

It is not a de Polignac number, because 80981245 - 2³ = 80981237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8098120 + ... + 8098129.

It is an arithmetic number, because the mean of its divisors is an integer number (24294375).

Almost surely, 2^80981245 is an apocalyptic number.

It is an amenable number.

80981245 is a deficient number, since it is larger than the sum of its proper divisors (16196255).

80981245 is a wasteful number, since it uses less digits than its factorization.

80981245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16196254.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 80981245 is about 8998.9579952348. The cubic root of 80981245 is about 432.6414742050.

It can be divided in two parts, 80 and 981245, that multiplied together give a square (78499600 = 8860²).

The spelling of 80981245 in words is "eighty million, nine hundred eighty-one thousand, two hundred forty-five".