102285261 has 56 divisors (see below), whose sum is σ = 169668576. Its totient is φ = 61236000.

The previous prime is 102285257. The next prime is 102285307. The reversal of 102285261 is 162582201.

It is a happy number.

It is not a de Polignac number, because 102285261 - 2² = 102285257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102285251) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 407386 + ... + 407636.

It is an arithmetic number, because the mean of its divisors is an integer number (3029796).

Almost surely, 2^102285261 is an apocalyptic number.

It is an amenable number.

102285261 is a deficient number, since it is larger than the sum of its proper divisors (67383315).

102285261 is an equidigital number, since it uses as much as digits as its factorization.

102285261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 102285261 is about 10113.6176020255. The cubic root of 102285261 is about 467.6680338130.

The spelling of 102285261 in words is "one hundred two million, two hundred eighty-five thousand, two hundred sixty-one".