10102561 has 4 divisors (see below), whose sum is σ = 11545792. Its totient is φ = 8659332.

The previous prime is 10102537. The next prime is 10102597. The reversal of 10102561 is 16520101.

It is a happy number.

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 10102561 - 2⁵ = 10102529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10102501) 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, 721605 + ... + 721618.

It is an arithmetic number, because the mean of its divisors is an integer number (2886448).

Almost surely, 2^10102561 is an apocalyptic number.

It is an amenable number.

10102561 is a deficient number, since it is larger than the sum of its proper divisors (1443231).

10102561 is an equidigital number, since it uses as much as digits as its factorization.

10102561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443230.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 10102561 is about 3178.4526109414. The cubic root of 10102561 is about 216.1775018428.

Adding to 10102561 its reverse (16520101), we get a palindrome (26622662).

The spelling of 10102561 in words is "ten million, one hundred two thousand, five hundred sixty-one".