102661263 has 20 divisors (see below), whose sum is σ = 153758088. Its totient is φ = 68262480.

The previous prime is 102661241. The next prime is 102661297. The reversal of 102661263 is 362166201.

It is not a de Polignac number, because 102661263 - 2⁹ = 102660751 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 (102661063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34453 + ... + 37313.

Almost surely, 2^102661263 is an apocalyptic number.

102661263 is a deficient number, since it is larger than the sum of its proper divisors (51096825).

102661263 is an equidigital number, since it uses as much as digits as its factorization.

102661263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316 (or 3307 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 102661263 is about 10132.1894474985. The cubic root of 102661263 is about 468.2403843969.

The spelling of 102661263 in words is "one hundred two million, six hundred sixty-one thousand, two hundred sixty-three".