102172015 has 8 divisors (see below), whose sum is σ = 133752528. Its totient is φ = 74306880.

The previous prime is 102171991. The next prime is 102172039. The reversal of 102172015 is 510271201.

It is an interprime number because it is at equal distance from previous prime (102171991) and next prime (102172039).

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

It is not a de Polignac number, because 102172015 - 2¹⁷ = 102040943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102171983 and 102172001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928782 + ... + 928891.

It is an arithmetic number, because the mean of its divisors is an integer number (16719066).

Almost surely, 2^102172015 is an apocalyptic number.

102172015 is a deficient number, since it is larger than the sum of its proper divisors (31580513).

102172015 is a wasteful number, since it uses less digits than its factorization.

102172015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857689.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 102172015 is about 10108.0173624702. The cubic root of 102172015 is about 467.4953758586.

It can be divided in two parts, 1021720 and 15, that added together give a triangular number (1021735 = T₁₄₂₉).

The spelling of 102172015 in words is "one hundred two million, one hundred seventy-two thousand, fifteen".