100642265 has 4 divisors (see below), whose sum is σ = 120770724. Its totient is φ = 80513808.

The previous prime is 100642247. The next prime is 100642271. The reversal of 100642265 is 562246001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562246001 = 2333 ⋅240997.

It can be written as a sum of positive squares in 2 ways, for example, as 60964864 + 39677401 = 7808^2 + 6299^2 .

It is a cyclic number.

It is not a de Polignac number, because 100642265 - 2²² = 96447961 is a prime.

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, 10064222 + ... + 10064231.

It is an arithmetic number, because the mean of its divisors is an integer number (30192681).

Almost surely, 2^100642265 is an apocalyptic number.

It is an amenable number.

100642265 is a deficient number, since it is larger than the sum of its proper divisors (20128459).

100642265 is an equidigital number, since it uses as much as digits as its factorization.

100642265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20128458.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 100642265 is about 10032.0618518827. The cubic root of 100642265 is about 465.1504735200.

Adding to 100642265 its reverse (562246001), we get a palindrome (662888266).

The spelling of 100642265 in words is "one hundred million, six hundred forty-two thousand, two hundred sixty-five".