16401042 has 56 divisors (see below), whose sum is σ = 42181056. Its totient is φ = 4683096.

The previous prime is 16401041. The next prime is 16401043. The reversal of 16401042 is 24010461.

It is an interprime number because it is at equal distance from previous prime (16401041) and next prime (16401043).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (16401041) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 9403 + ... + 11009.

Almost surely, 2^16401042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16401042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21090528).

16401042 is an abundant number, since it is smaller than the sum of its proper divisors (25780014).

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

16401042 is an equidigital number, since it uses as much as digits as its factorization.

16401042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16401042 is about 4049.8199959998. The cubic root of 16401042 is about 254.0721992866.

The spelling of 16401042 in words is "sixteen million, four hundred one thousand, forty-two".