15120023 has 2 divisors, whose sum is σ = 15120024. Its totient is φ = 15120022.

The previous prime is 15120019. The next prime is 15120031. The reversal of 15120023 is 32002151.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15120023 - 2² = 15120019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15120823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560011 + 7560012.

It is an arithmetic number, because the mean of its divisors is an integer number (7560012).

Almost surely, 2^15120023 is an apocalyptic number.

15120023 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120023 is an equidigital number, since it uses as much as digits as its factorization.

15120023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 15120023 is about 3888.4473765245. The cubic root of 15120023 is about 247.2772433715.

Adding to 15120023 its reverse (32002151), we get a palindrome (47122174).

The spelling of 15120023 in words is "fifteen million, one hundred twenty thousand, twenty-three".