15997254 has 64 divisors (see below), whose sum is σ = 39965184. Its totient is φ = 4156416.

The previous prime is 15997243. The next prime is 15997273. The reversal of 15997254 is 45279951.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 45142 + ... + 45494.

It is an arithmetic number, because the mean of its divisors is an integer number (624456).

Almost surely, 2^15997254 is an apocalyptic number.

15997254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15997254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19982592).

15997254 is an abundant number, since it is smaller than the sum of its proper divisors (23967930).

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

15997254 is a wasteful number, since it uses less digits than its factorization.

15997254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its digits is 113400, while the sum is 42.

The square root of 15997254 is about 3999.6567352712. The cubic root of 15997254 is about 251.9697935575.

The spelling of 15997254 in words is "fifteen million, nine hundred ninety-seven thousand, two hundred fifty-four".