15321142 has 8 divisors (see below), whose sum is σ = 23057496. Its totient is φ = 7635312.

The previous prime is 15321139. The next prime is 15321143. The reversal of 15321142 is 24112351.

15321142 is digitally balanced in base 2, because in such base 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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15321143) 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, 11863 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (2882187).

Almost surely, 2^15321142 is an apocalyptic number.

15321142 is a deficient number, since it is larger than the sum of its proper divisors (7736354).

15321142 is a wasteful number, since it uses less digits than its factorization.

15321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25262.

The product of its digits is 240, while the sum is 19.

The square root of 15321142 is about 3914.2230391228. The cubic root of 15321142 is about 248.3688039459.

Adding to 15321142 its reverse (24112351), we get a palindrome (39433493).

The spelling of 15321142 in words is "fifteen million, three hundred twenty-one thousand, one hundred forty-two".