100025520 has 80 divisors (see below), whose sum is σ = 354382080. Its totient is φ = 22862592.

The previous prime is 100025479. The next prime is 100025521. The reversal of 100025520 is 25520001.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100025520.

It is not an unprimeable number, because it can be changed into a prime (100025521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28090 + ... + 31449.

It is an arithmetic number, because the mean of its divisors is an integer number (4429776).

Almost surely, 2^100025520 is an apocalyptic number.

100025520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100025520 is an abundant number, since it is smaller than the sum of its proper divisors (254356560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100025520 is a wasteful number, since it uses less digits than its factorization.

100025520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59562 (or 59556 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 100025520 is about 10001.2759186016. The cubic root of 100025520 is about 464.1983644520.

Adding to 100025520 its reverse (25520001), we get a palindrome (125545521).

The spelling of 100025520 in words is "one hundred million, twenty-five thousand, five hundred twenty".