102181279 has 4 divisors (see below), whose sum is σ = 102985984. Its totient is φ = 101376576.

The previous prime is 102181273. The next prime is 102181319. The reversal of 102181279 is 972181201.

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 102181279 - 2⁷ = 102181151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102181279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102181273) 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, 402162 + ... + 402415.

It is an arithmetic number, because the mean of its divisors is an integer number (25746496).

Almost surely, 2^102181279 is an apocalyptic number.

102181279 is a deficient number, since it is larger than the sum of its proper divisors (804705).

102181279 is an equidigital number, since it uses as much as digits as its factorization.

102181279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804704.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 102181279 is about 10108.4756021865. The cubic root of 102181279 is about 467.5095047969.

The spelling of 102181279 in words is "one hundred two million, one hundred eighty-one thousand, two hundred seventy-nine".