102561113 has 4 divisors (see below), whose sum is σ = 105869568. Its totient is φ = 99252660.

The previous prime is 102561103. The next prime is 102561127. The reversal of 102561113 is 311165201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102561113 - 2¹² = 102557017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102561103) 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, 1654181 + ... + 1654242.

It is an arithmetic number, because the mean of its divisors is an integer number (26467392).

Almost surely, 2^102561113 is an apocalyptic number.

It is an amenable number.

102561113 is a deficient number, since it is larger than the sum of its proper divisors (3308455).

102561113 is an equidigital number, since it uses as much as digits as its factorization.

102561113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308454.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 102561113 is about 10127.2460718598. The cubic root of 102561113 is about 468.0880727055.

The spelling of 102561113 in words is "one hundred two million, five hundred sixty-one thousand, one hundred thirteen".