15997461 has 8 divisors (see below), whose sum is σ = 21367200. Its totient is φ = 10646352.

The previous prime is 15997451. The next prime is 15997469. The reversal of 15997461 is 16479951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-15997461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15997469) 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 7 ways as a sum of consecutive naturals, for example, 2511 + ... + 6188.

It is an arithmetic number, because the mean of its divisors is an integer number (2670900).

Almost surely, 2^15997461 is an apocalyptic number.

It is an amenable number.

15997461 is a deficient number, since it is larger than the sum of its proper divisors (5369739).

15997461 is an equidigital number, since it uses as much as digits as its factorization.

15997461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315.

The product of its digits is 68040, while the sum is 42.

The square root of 15997461 is about 3999.6826124081. The cubic root of 15997461 is about 251.9708803591.

The spelling of 15997461 in words is "fifteen million, nine hundred ninety-seven thousand, four hundred sixty-one".