15542642 has 8 divisors (see below), whose sum is σ = 23331456. Its totient is φ = 7765492.

The previous prime is 15542633. The next prime is 15542647. The reversal of 15542642 is 24624551.

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

It is not an unprimeable number, because it can be changed into a prime (15542647) 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 3 ways as a sum of consecutive naturals, for example, 2243 + ... + 6009.

It is an arithmetic number, because the mean of its divisors is an integer number (2916432).

Almost surely, 2^15542642 is an apocalyptic number.

15542642 is a deficient number, since it is larger than the sum of its proper divisors (7788814).

15542642 is a wasteful number, since it uses less digits than its factorization.

15542642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832.

The product of its digits is 9600, while the sum is 29.

The square root of 15542642 is about 3942.4157568679. The cubic root of 15542642 is about 249.5599833290.

The spelling of 15542642 in words is "fifteen million, five hundred forty-two thousand, six hundred forty-two".