102042079 has 4 divisors (see below), whose sum is σ = 102278176. Its totient is φ = 101805984.

The previous prime is 102042077. The next prime is 102042089. The reversal of 102042079 is 970240201.

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

It is a cyclic number.

It is not a de Polignac number, because 102042079 - 2¹ = 102042077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102042077) 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, 117399 + ... + 118264.

It is an arithmetic number, because the mean of its divisors is an integer number (25569544).

Almost surely, 2^102042079 is an apocalyptic number.

102042079 is a deficient number, since it is larger than the sum of its proper divisors (236097).

102042079 is an equidigital number, since it uses as much as digits as its factorization.

102042079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236096.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 102042079 is about 10101.5879444768. The cubic root of 102042079 is about 467.2971146299.

The spelling of 102042079 in words is "one hundred two million, forty-two thousand, seventy-nine".