104142609 has 18 divisors (see below), whose sum is σ = 155450178. Its totient is φ = 67183200.

The previous prime is 104142601. The next prime is 104142613. The reversal of 104142609 is 906241401.

104142609 is a `hidden beast` number, since 10 + 4 + 1 + 42 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 93547584 + 10595025 = 9672^2 + 3255^2 .

It is not a de Polignac number, because 104142609 - 2³ = 104142601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (104142601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2629 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (8636121).

Almost surely, 2^104142609 is an apocalyptic number.

It is an amenable number.

104142609 is a deficient number, since it is larger than the sum of its proper divisors (51307569).

104142609 is a wasteful number, since it uses less digits than its factorization.

104142609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12109 (or 12075 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 104142609 is about 10205.0286133847. The cubic root of 104142609 is about 470.4817890418.

The spelling of 104142609 in words is "one hundred four million, one hundred forty-two thousand, six hundred nine".