78501 has 8 divisors (see below), whose sum is σ = 105984. Its totient is φ = 51680.

The previous prime is 78497. The next prime is 78509. The reversal of 78501 is 10587.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78501 - 2² = 78497 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78509) 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, 316 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (13248).

2⁷⁸⁵⁰¹ is an apocalyptic number.

It is an amenable number.

78501 is a deficient number, since it is larger than the sum of its proper divisors (27483).

78501 is a wasteful number, since it uses less digits than its factorization.

78501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 78501 is about 280.1802990933. The cubic root of 78501 is about 42.8178703725.

The spelling of 78501 in words is "seventy-eight thousand, five hundred one".