102595981 has 4 divisors (see below), whose sum is σ = 105098364. Its totient is φ = 100093600.

The previous prime is 102595967. The next prime is 102596009. The reversal of 102595981 is 189595201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40832100 + 61763881 = 6390^2 + 7859^2 .

It is a cyclic number.

It is not a de Polignac number, because 102595981 - 2⁷ = 102595853 is a prime.

It is a super-2 number, since 2×102595981² = 21051870634704722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102595081) 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, 1251130 + ... + 1251211.

It is an arithmetic number, because the mean of its divisors is an integer number (26274591).

Almost surely, 2^102595981 is an apocalyptic number.

It is an amenable number.

102595981 is a deficient number, since it is larger than the sum of its proper divisors (2502383).

102595981 is an equidigital number, since it uses as much as digits as its factorization.

102595981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502382.

The product of its (nonzero) digits is 32400, while the sum is 40.

The square root of 102595981 is about 10128.9674202260. The cubic root of 102595981 is about 468.1411124500.

The spelling of 102595981 in words is "one hundred two million, five hundred ninety-five thousand, nine hundred eighty-one".