102104661 has 16 divisors (see below), whose sum is σ = 139656704. Its totient is φ = 66319344.

The previous prime is 102104641. The next prime is 102104671. The reversal of 102104661 is 166401201.

It is not a de Polignac number, because 102104661 - 2¹⁰ = 102103637 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 (102104641) 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, 69840 + ... + 71286.

It is an arithmetic number, because the mean of its divisors is an integer number (8728544).

Almost surely, 2^102104661 is an apocalyptic number.

It is an amenable number.

102104661 is a deficient number, since it is larger than the sum of its proper divisors (37552043).

102104661 is a wasteful number, since it uses less digits than its factorization.

102104661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 102104661 is about 10104.6851014764. The cubic root of 102104661 is about 467.3926255925.

Adding to 102104661 its reverse (166401201), we get a palindrome (268505862).

The spelling of 102104661 in words is "one hundred two million, one hundred four thousand, six hundred sixty-one".