102572861 has 8 divisors (see below), whose sum is σ = 104779224. Its totient is φ = 100376640.

The previous prime is 102572851. The next prime is 102572879. The reversal of 102572861 is 168275201.

It can be written as a sum of positive squares in 4 ways, for example, as 1188100 + 101384761 = 1090^2 + 10069^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 102572861 - 2¹⁰ = 102571837 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 (102572851) 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, 20015 + ... + 24611.

It is an arithmetic number, because the mean of its divisors is an integer number (13097403).

Almost surely, 2^102572861 is an apocalyptic number.

It is an amenable number.

102572861 is a deficient number, since it is larger than the sum of its proper divisors (2206363).

102572861 is an equidigital number, since it uses as much as digits as its factorization.

102572861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 102572861 is about 10127.8260747309. The cubic root of 102572861 is about 468.1059446148.

The spelling of 102572861 in words is "one hundred two million, five hundred seventy-two thousand, eight hundred sixty-one".