1252840079 has 2 divisors, whose sum is σ = 1252840080. Its totient is φ = 1252840078.

The previous prime is 1252840033. The next prime is 1252840103. The reversal of 1252840079 is 9700482521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252840079 - 2⁸ = 1252839823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252840579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626420039 + 626420040.

It is an arithmetic number, because the mean of its divisors is an integer number (626420040).

Almost surely, 2^1252840079 is an apocalyptic number.

1252840079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252840079 is an equidigital number, since it uses as much as digits as its factorization.

1252840079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1252840079 is about 35395.4810533774. The cubic root of 1252840079 is about 1078.0325632142.

The spelling of 1252840079 in words is "one billion, two hundred fifty-two million, eight hundred forty thousand, seventy-nine".