102407665 has 4 divisors (see below), whose sum is σ = 122889204. Its totient is φ = 81926128.

The previous prime is 102407659. The next prime is 102407687. The reversal of 102407665 is 566704201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566704201 = 7 ⋅80957743.

It can be written as a sum of positive squares in 2 ways, for example, as 50466816 + 51940849 = 7104^2 + 7207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102407665 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10240762 + ... + 10240771.

It is an arithmetic number, because the mean of its divisors is an integer number (30722301).

Almost surely, 2^102407665 is an apocalyptic number.

It is an amenable number.

102407665 is a deficient number, since it is larger than the sum of its proper divisors (20481539).

102407665 is an equidigital number, since it uses as much as digits as its factorization.

102407665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20481538.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 102407665 is about 10119.6672376121. The cubic root of 102407665 is about 467.8545110499.

The spelling of 102407665 in words is "one hundred two million, four hundred seven thousand, six hundred sixty-five".