16247491 has 12 divisors (see below), whose sum is σ = 17755392. Its totient is φ = 14859936.

The previous prime is 16247471. The next prime is 16247501. The reversal of 16247491 is 19474261.

It is a de Polignac number, because none of the positive numbers 2^k-16247491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16247401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21085 + ... + 21841.

It is an arithmetic number, because the mean of its divisors is an integer number (1479616).

Almost surely, 2^16247491 is an apocalyptic number.

16247491 is a deficient number, since it is larger than the sum of its proper divisors (1507901).

16247491 is a wasteful number, since it uses less digits than its factorization.

16247491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 897 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 16247491 is about 4030.8176589868. The cubic root of 16247491 is about 253.2768142997.

The spelling of 16247491 in words is "sixteen million, two hundred forty-seven thousand, four hundred ninety-one".