15142242 has 8 divisors (see below), whose sum is σ = 30284496. Its totient is φ = 5047412.

The previous prime is 15142219. The next prime is 15142249. The reversal of 15142242 is 24224151.

15142242 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

15142242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15142249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261848 + ... + 1261859.

It is an arithmetic number, because the mean of its divisors is an integer number (3785562).

Almost surely, 2^15142242 is an apocalyptic number.

15142242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15142242 is a wasteful number, since it uses less digits than its factorization.

15142242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523712.

The product of its digits is 640, while the sum is 21.

The square root of 15142242 is about 3891.3033806168. The cubic root of 15142242 is about 247.3983094127.

Adding to 15142242 its reverse (24224151), we get a palindrome (39366393).

The spelling of 15142242 in words is "fifteen million, one hundred forty-two thousand, two hundred forty-two".