100025001 has 24 divisors (see below), whose sum is σ = 148318560. Its totient is φ = 64934016.

The previous prime is 100024993. The next prime is 100025017. The reversal of 100025001 is 100520001.

It is a happy number.

It is not a de Polignac number, because 100025001 - 2³ = 100024993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100025201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59170 + ... + 60836.

It is an arithmetic number, because the mean of its divisors is an integer number (6179940).

Almost surely, 2^100025001 is an apocalyptic number.

100025001 is the 5001-st decagonal number.

It is an amenable number.

100025001 is a deficient number, since it is larger than the sum of its proper divisors (48293559).

100025001 is a wasteful number, since it uses less digits than its factorization.

100025001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 100025001 is about 10001.2499718785. The cubic root of 100025001 is about 464.1975615923.

Adding to 100025001 its reverse (100520001), we get a palindrome (200545002).

The spelling of 100025001 in words is "one hundred million, twenty-five thousand, one".