102664015 has 4 divisors (see below), whose sum is σ = 123196824. Its totient is φ = 82131208.

The previous prime is 102664013. The next prime is 102664057. The reversal of 102664015 is 510466201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102664015 - 2¹ = 102664013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102664013) 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, 10266397 + ... + 10266406.

It is an arithmetic number, because the mean of its divisors is an integer number (30799206).

Almost surely, 2^102664015 is an apocalyptic number.

102664015 is a deficient number, since it is larger than the sum of its proper divisors (20532809).

102664015 is an equidigital number, since it uses as much as digits as its factorization.

102664015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532808.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 102664015 is about 10132.3252513922. The cubic root of 102664015 is about 468.2445683380.

The spelling of 102664015 in words is "one hundred two million, six hundred sixty-four thousand, fifteen".