15340247 has 4 divisors (see below), whose sum is σ = 16520280. Its totient is φ = 14160216.

The previous prime is 15340229. The next prime is 15340261. The reversal of 15340247 is 74204351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15340247 - 2¹² = 15336151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15343247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589997 + ... + 590022.

It is an arithmetic number, because the mean of its divisors is an integer number (4130070).

Almost surely, 2^15340247 is an apocalyptic number.

15340247 is a deficient number, since it is larger than the sum of its proper divisors (1180033).

15340247 is a wasteful number, since it uses less digits than its factorization.

15340247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180032.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 15340247 is about 3916.6627375867. The cubic root of 15340247 is about 248.4719971900.

Adding to 15340247 its reverse (74204351), we get a palindrome (89544598).

The spelling of 15340247 in words is "fifteen million, three hundred forty thousand, two hundred forty-seven".