16401072 has 40 divisors (see below), whose sum is σ = 42519600. Its totient is φ = 5447680.

The previous prime is 16401061. The next prime is 16401083. The reversal of 16401072 is 27010461.

It is an interprime number because it is at equal distance from previous prime (16401061) and next prime (16401083).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21172 + ... + 21932.

It is an arithmetic number, because the mean of its divisors is an integer number (1062990).

Almost surely, 2^16401072 is an apocalyptic number.

16401072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16401072 is an abundant number, since it is smaller than the sum of its proper divisors (26118528).

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

16401072 is a wasteful number, since it uses less digits than its factorization.

16401072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 16401072 is about 4049.8236998665. The cubic root of 16401072 is about 254.0723541987.

The spelling of 16401072 in words is "sixteen million, four hundred one thousand, seventy-two".