101985406 has 4 divisors (see below), whose sum is σ = 152978112. Its totient is φ = 50992702.

The previous prime is 101985391. The next prime is 101985413. The reversal of 101985406 is 604589101.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 25496350 + ... + 25496353.

It is an arithmetic number, because the mean of its divisors is an integer number (38244528).

Almost surely, 2^101985406 is an apocalyptic number.

101985406 is a deficient number, since it is larger than the sum of its proper divisors (50992706).

101985406 is an equidigital number, since it uses as much as digits as its factorization.

101985406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50992705.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 101985406 is about 10098.7824018542. The cubic root of 101985406 is about 467.2105881238.

The spelling of 101985406 in words is "one hundred one million, nine hundred eighty-five thousand, four hundred six".