252278459 has 2 divisors, whose sum is σ = 252278460. Its totient is φ = 252278458.

The previous prime is 252278443. The next prime is 252278471. The reversal of 252278459 is 954872252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252278459 - 2⁴ = 252278443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252278659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126139229 + 126139230.

It is an arithmetic number, because the mean of its divisors is an integer number (126139230).

Almost surely, 2^252278459 is an apocalyptic number.

252278459 is a deficient number, since it is larger than the sum of its proper divisors (1).

252278459 is an equidigital number, since it uses as much as digits as its factorization.

252278459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 252278459 is about 15883.2760789454. The cubic root of 252278459 is about 631.8685258681.

The spelling of 252278459 in words is "two hundred fifty-two million, two hundred seventy-eight thousand, four hundred fifty-nine".