15122142 has 24 divisors (see below), whose sum is σ = 37445616. Its totient is φ = 4320576.

The previous prime is 15122131. The next prime is 15122143. The reversal of 15122142 is 24122151.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15122143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59883 + ... + 60134.

It is an arithmetic number, because the mean of its divisors is an integer number (1560234).

Almost surely, 2^15122142 is an apocalyptic number.

15122142 is an abundant number, since it is smaller than the sum of its proper divisors (22323474).

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

15122142 is a wasteful number, since it uses less digits than its factorization.

15122142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120032 (or 120029 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 15122142 is about 3888.7198407702. The cubic root of 15122142 is about 247.2887944122.

Adding to 15122142 its reverse (24122151), we get a palindrome (39244293).

Subtracting 15122142 from its reverse (24122151), we obtain a palindrome (9000009).

The spelling of 15122142 in words is "fifteen million, one hundred twenty-two thousand, one hundred forty-two".