102072021 has 8 divisors (see below), whose sum is σ = 138127584. Its totient is φ = 67032240.

The previous prime is 102072013. The next prime is 102072023. The reversal of 102072021 is 120270201.

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

It is not a de Polignac number, because 102072021 - 2³ = 102072013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102072023) 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, 253710 + ... + 254111.

It is an arithmetic number, because the mean of its divisors is an integer number (17265948).

Almost surely, 2^102072021 is an apocalyptic number.

It is an amenable number.

102072021 is a deficient number, since it is larger than the sum of its proper divisors (36055563).

102072021 is an equidigital number, since it uses as much as digits as its factorization.

102072021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507891.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 102072021 is about 10103.0698799919. The cubic root of 102072021 is about 467.3428161746.

The spelling of 102072021 in words is "one hundred two million, seventy-two thousand, twenty-one".