100040725 has 6 divisors (see below), whose sum is σ = 124050530. Its totient is φ = 80032560.

The previous prime is 100040713. The next prime is 100040741. The reversal of 100040725 is 527040001.

It can be written as a sum of positive squares in 3 ways, for example, as 21150801 + 78889924 = 4599^2 + 8882^2 .

It is not a de Polignac number, because 100040725 - 2¹¹ = 100038677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2000790 + ... + 2000839.

Almost surely, 2^100040725 is an apocalyptic number.

It is an amenable number.

100040725 is a deficient number, since it is larger than the sum of its proper divisors (24009805).

100040725 is an equidigital number, since it uses as much as digits as its factorization.

100040725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001639 (or 4001634 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 100040725 is about 10002.0360427265. The cubic root of 100040725 is about 464.2218843781.

Adding to 100040725 its reverse (527040001), we get a palindrome (627080726).

The spelling of 100040725 in words is "one hundred million, forty thousand, seven hundred twenty-five".