1252127399 has 2 divisors, whose sum is σ = 1252127400. Its totient is φ = 1252127398.

The previous prime is 1252127381. The next prime is 1252127407. The reversal of 1252127399 is 9937212521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252127399 - 2¹² = 1252123303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252127099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626063699 + 626063700.

It is an arithmetic number, because the mean of its divisors is an integer number (626063700).

Almost surely, 2^1252127399 is an apocalyptic number.

1252127399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252127399 is an equidigital number, since it uses as much as digits as its factorization.

1252127399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 1252127399 is about 35385.4122344223. The cubic root of 1252127399 is about 1077.8281109495.

The spelling of 1252127399 in words is "one billion, two hundred fifty-two million, one hundred twenty-seven thousand, three hundred ninety-nine".