1252278169 has 2 divisors, whose sum is σ = 1252278170. Its totient is φ = 1252278168.

The previous prime is 1252278161. The next prime is 1252278179. The reversal of 1252278169 is 9618722521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217172544 + 35105625 = 34888^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252278169 - 2³ = 1252278161 is a prime.

It is a super-2 number, since 2×1252278169² = 3136401225107985122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1252278161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626139084 + 626139085.

It is an arithmetic number, because the mean of its divisors is an integer number (626139085).

Almost surely, 2^1252278169 is an apocalyptic number.

It is an amenable number.

1252278169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252278169 is an equidigital number, since it uses as much as digits as its factorization.

1252278169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 1252278169 is about 35387.5425679716. The cubic root of 1252278169 is about 1077.8713700253.

The spelling of 1252278169 in words is "one billion, two hundred fifty-two million, two hundred seventy-eight thousand, one hundred sixty-nine".