100125665 has 8 divisors (see below), whose sum is σ = 127218600. Its totient is φ = 75388672.

The previous prime is 100125659. The next prime is 100125667. The reversal of 100125665 is 566521001.

It can be written as a sum of positive squares in 4 ways, for example, as 49900096 + 50225569 = 7064^2 + 7087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100125665 - 2⁸ = 100125409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100125667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588890 + ... + 589059.

It is an arithmetic number, because the mean of its divisors is an integer number (15902325).

Almost surely, 2^100125665 is an apocalyptic number.

It is an amenable number.

100125665 is a deficient number, since it is larger than the sum of its proper divisors (27092935).

100125665 is a wasteful number, since it uses less digits than its factorization.

100125665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177971.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 100125665 is about 10006.2812772778. The cubic root of 100125665 is about 464.3532303955.

Adding to 100125665 its reverse (566521001), we get a palindrome (666646666).

The spelling of 100125665 in words is "one hundred million, one hundred twenty-five thousand, six hundred sixty-five".