15969642 has 32 divisors (see below), whose sum is σ = 35054208. Its totient is φ = 4819776.

The previous prime is 15969637. The next prime is 15969649. The reversal of 15969642 is 24696951.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15969594 and 15969603.

It is not an unprimeable number, because it can be changed into a prime (15969649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2203 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (1095444).

Almost surely, 2^15969642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15969642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17527104).

15969642 is an abundant number, since it is smaller than the sum of its proper divisors (19084566).

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

15969642 is a wasteful number, since it uses less digits than its factorization.

15969642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934.

The product of its digits is 116640, while the sum is 42.

The square root of 15969642 is about 3996.2034482744. The cubic root of 15969642 is about 251.8247395645.

The spelling of 15969642 in words is "fifteen million, nine hundred sixty-nine thousand, six hundred forty-two".