15240779 has 2 divisors, whose sum is σ = 15240780. Its totient is φ = 15240778.

The previous prime is 15240773. The next prime is 15240787. The reversal of 15240779 is 97704251.

15240779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15240779 - 2⁸ = 15240523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (15240773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620389 + 7620390.

It is an arithmetic number, because the mean of its divisors is an integer number (7620390).

Almost surely, 2^15240779 is an apocalyptic number.

15240779 is a deficient number, since it is larger than the sum of its proper divisors (1).

15240779 is an equidigital number, since it uses as much as digits as its factorization.

15240779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 15240779 is about 3903.9440313611. The cubic root of 15240779 is about 247.9337915091.

The spelling of 15240779 in words is "fifteen million, two hundred forty thousand, seven hundred seventy-nine".