100401015 has 32 divisors (see below), whose sum is σ = 188729856. Its totient is φ = 44933760.

The previous prime is 100401011. The next prime is 100401023. The reversal of 100401015 is 510104001.

It is a happy number.

It is not a de Polignac number, because 100401015 - 2² = 100401011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100401011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21259 + ... + 25548.

It is an arithmetic number, because the mean of its divisors is an integer number (5897808).

Almost surely, 2^100401015 is an apocalyptic number.

100401015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100401015 is a deficient number, since it is larger than the sum of its proper divisors (88328841).

100401015 is a wasteful number, since it uses less digits than its factorization.

100401015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46839.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 100401015 is about 10020.0306885758. The cubic root of 100401015 is about 464.7785047550.

Adding to 100401015 its reverse (510104001), we get a palindrome (610505016).

The spelling of 100401015 in words is "one hundred million, four hundred one thousand, fifteen".