15120097 has 4 divisors (see below), whose sum is σ = 15128836. Its totient is φ = 15111360.

The previous prime is 15120071. The next prime is 15120101. The reversal of 15120097 is 79002151.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4822416 + 10297681 = 2196^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120097 - 2⁷ = 15119969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15120797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804 + ... + 5557.

It is an arithmetic number, because the mean of its divisors is an integer number (3782209).

Almost surely, 2^15120097 is an apocalyptic number.

It is an amenable number.

15120097 is a deficient number, since it is larger than the sum of its proper divisors (8739).

15120097 is an equidigital number, since it uses as much as digits as its factorization.

15120097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 15120097 is about 3888.4568918788. The cubic root of 15120097 is about 247.2776467766.

The spelling of 15120097 in words is "fifteen million, one hundred twenty thousand, ninety-seven".