101561404 has 48 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 42586560.

The previous prime is 101561381. The next prime is 101561423. The reversal of 101561404 is 404165101.

It is a congruent number.

It is an unprimeable number.

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, 326409 + ... + 326719.

It is an arithmetic number, because the mean of its divisors is an integer number (4324320).

Almost surely, 2^101561404 is an apocalyptic number.

101561404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

101561404 is an abundant number, since it is smaller than the sum of its proper divisors (106005956).

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

101561404 is a wasteful number, since it uses less digits than its factorization.

101561404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 101561404 is about 10077.7678083988. The cubic root of 101561404 is about 466.5622163060.

The spelling of 101561404 in words is "one hundred one million, five hundred sixty-one thousand, four hundred four".