16012491 has 16 divisors (see below), whose sum is σ = 23362560. Its totient is φ = 9674720.

The previous prime is 16012481. The next prime is 16012499. The reversal of 16012491 is 19421061.

It is not a de Polignac number, because 16012491 - 2⁷ = 16012363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16012499) by changing a digit.

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, 15301 + ... + 16313.

It is an arithmetic number, because the mean of its divisors is an integer number (1460160).

Almost surely, 2^16012491 is an apocalyptic number.

16012491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16012491 is a deficient number, since it is larger than the sum of its proper divisors (7350069).

16012491 is a wasteful number, since it uses less digits than its factorization.

16012491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 16012491 is about 4001.5610703824. The cubic root of 16012491 is about 252.0497665632.

The spelling of 16012491 in words is "sixteen million, twelve thousand, four hundred ninety-one".