78051 has 4 divisors (see below), whose sum is σ = 104072. Its totient is φ = 52032.

The previous prime is 78049. The next prime is 78059. The reversal of 78051 is 15087.

It is a happy number.

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

It is not a de Polignac number, because 78051 - 2¹ = 78049 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78059) 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, 13006 + ... + 13011.

It is an arithmetic number, because the mean of its divisors is an integer number (26018).

2⁷⁸⁰⁵¹ is an apocalyptic number.

78051 is a deficient number, since it is larger than the sum of its proper divisors (26021).

78051 is a wasteful number, since it uses less digits than its factorization.

78051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26020.

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

The square root of 78051 is about 279.3760906019. The cubic root of 78051 is about 42.7358969930.

The spelling of 78051 in words is "seventy-eight thousand, fifty-one".