15042257 has 2 divisors, whose sum is σ = 15042258. Its totient is φ = 15042256.

The previous prime is 15042197. The next prime is 15042277. The reversal of 15042257 is 75224051.

15042257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 4999696 = 3169^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 15042257 - 2⁶ = 15042193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15042277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7521128 + 7521129.

It is an arithmetic number, because the mean of its divisors is an integer number (7521129).

Almost surely, 2^15042257 is an apocalyptic number.

It is an amenable number.

15042257 is a deficient number, since it is larger than the sum of its proper divisors (1).

15042257 is an equidigital number, since it uses as much as digits as its factorization.

15042257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 15042257 is about 3878.4348647360. The cubic root of 15042257 is about 246.8525785758.

The spelling of 15042257 in words is "fifteen million, forty-two thousand, two hundred fifty-seven".