80645242 has 8 divisors (see below), whose sum is σ = 121122036. Its totient is φ = 40271232.

The previous prime is 80645239. The next prime is 80645249. The reversal of 80645242 is 24254608.

It can be written as a sum of positive squares in 2 ways, for example, as 80622441 + 22801 = 8979^2 + 151^2 .

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

It is not an unprimeable number, because it can be changed into a prime (80645249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23703 + ... + 26890.

Almost surely, 2^80645242 is an apocalyptic number.

80645242 is a deficient number, since it is larger than the sum of its proper divisors (40476794).

80645242 is a wasteful number, since it uses less digits than its factorization.

80645242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51392.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 80645242 is about 8980.2695950623. The cubic root of 80645242 is about 432.0422805269.

The spelling of 80645242 in words is "eighty million, six hundred forty-five thousand, two hundred forty-two".