102140665 has 16 divisors (see below), whose sum is σ = 133909056. Its totient is φ = 74174400.

The previous prime is 102140663. The next prime is 102140681. The reversal of 102140665 is 566041201.

It is not a de Polignac number, because 102140665 - 2¹ = 102140663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102140663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65950 + ... + 67480.

It is an arithmetic number, because the mean of its divisors is an integer number (8369316).

Almost surely, 2^102140665 is an apocalyptic number.

It is an amenable number.

102140665 is a deficient number, since it is larger than the sum of its proper divisors (31768391).

102140665 is a wasteful number, since it uses less digits than its factorization.

102140665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

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

The square root of 102140665 is about 10106.4664942798. The cubic root of 102140665 is about 467.4475562436.

Adding to 102140665 its reverse (566041201), we get a palindrome (668181866).

The spelling of 102140665 in words is "one hundred two million, one hundred forty thousand, six hundred sixty-five".