102912381 has 36 divisors (see below), whose sum is σ = 175627296. Its totient is φ = 57564000.

The previous prime is 102912349. The next prime is 102912443. The reversal of 102912381 is 183219201.

It is not a de Polignac number, because 102912381 - 2⁵ = 102912349 is a prime.

It is a super-2 number, since 2×102912381² = 21181916326178322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102912301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13656 + ... + 19806.

It is an arithmetic number, because the mean of its divisors is an integer number (4878536).

Almost surely, 2^102912381 is an apocalyptic number.

102912381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102912381 is a deficient number, since it is larger than the sum of its proper divisors (72714915).

102912381 is a wasteful number, since it uses less digits than its factorization.

102912381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 102912381 is about 10144.5739683833. The cubic root of 102912381 is about 468.6218585200.

The spelling of 102912381 in words is "one hundred two million, nine hundred twelve thousand, three hundred eighty-one".