15120402 has 48 divisors (see below), whose sum is σ = 33899040. Its totient is φ = 4491520.

The previous prime is 15120379. The next prime is 15120403. The reversal of 15120402 is 20402151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42658 + ... + 43010.

It is an arithmetic number, because the mean of its divisors is an integer number (706230).

Almost surely, 2^15120402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15120402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16949520).

15120402 is an abundant number, since it is smaller than the sum of its proper divisors (18778638).

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

15120402 is a wasteful number, since it uses less digits than its factorization.

15120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 15120402 is about 3888.4961103234. The cubic root of 15120402 is about 247.2793094462.

Adding to 15120402 its reverse (20402151), we get a palindrome (35522553).

The spelling of 15120402 in words is "fifteen million, one hundred twenty thousand, four hundred two".