100401520 has 40 divisors (see below), whose sum is σ = 234043056. Its totient is φ = 40055808.

The previous prime is 100401503. The next prime is 100401527. The reversal of 100401520 is 25104001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 100401520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100401527) 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, 34024 + ... + 36856.

Almost surely, 2^100401520 is an apocalyptic number.

100401520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100401520 is an abundant number, since it is smaller than the sum of its proper divisors (133641536).

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

100401520 is a wasteful number, since it uses less digits than its factorization.

100401520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 100401520 is about 10020.0558880677. The cubic root of 100401520 is about 464.7792840060.

Adding to 100401520 its reverse (25104001), we get a palindrome (125505521).

The spelling of 100401520 in words is "one hundred million, four hundred one thousand, five hundred twenty".