15242340 has 24 divisors (see below), whose sum is σ = 42678720. Its totient is φ = 4064608.

The previous prime is 15242329. The next prime is 15242401. The reversal of 15242340 is 4324251.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126960 + ... + 127079.

It is an arithmetic number, because the mean of its divisors is an integer number (1778280).

Almost surely, 2^15242340 is an apocalyptic number.

15242340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15242340 is an abundant number, since it is smaller than the sum of its proper divisors (27436380).

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

15242340 is a wasteful number, since it uses less digits than its factorization.

15242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254051 (or 254049 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 15242340 is about 3904.1439522641. The cubic root of 15242340 is about 247.9422558935.

Adding to 15242340 its reverse (4324251), we get a palindrome (19566591).

The spelling of 15242340 in words is "fifteen million, two hundred forty-two thousand, three hundred forty".