15245121 has 4 divisors (see below), whose sum is σ = 20326832. Its totient is φ = 10163412.

The previous prime is 15245119. The next prime is 15245123. The reversal of 15245121 is 12154251.

15245121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (15245119) and next prime (15245123).

It is not a de Polignac number, because 15245121 - 2¹ = 15245119 is a prime.

It is the 3905-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15245123) by changing a digit.

It is a nontrivial repunit in base 3904.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540851 + ... + 2540856.

It is an arithmetic number, because the mean of its divisors is an integer number (5081708).

Almost surely, 2^15245121 is an apocalyptic number.

It is an amenable number.

15245121 is a deficient number, since it is larger than the sum of its proper divisors (5081711).

15245121 is an equidigital number, since it uses as much as digits as its factorization.

15245121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081710.

The product of its digits is 400, while the sum is 21.

The square root of 15245121 is about 3904.5000960430. The cubic root of 15245121 is about 247.9573341881.

Adding to 15245121 its reverse (12154251), we get a palindrome (27399372).

The spelling of 15245121 in words is "fifteen million, two hundred forty-five thousand, one hundred twenty-one".