1252279739 has 2 divisors, whose sum is σ = 1252279740. Its totient is φ = 1252279738.

The previous prime is 1252279663. The next prime is 1252279757. The reversal of 1252279739 is 9379722521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252279739 - 2²⁸ = 983844283 is a prime.

It is a super-3 number, since 3×1252279739³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1252279693 and 1252279702.

It is not a weakly prime, because it can be changed into another prime (1252279799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626139869 + 626139870.

It is an arithmetic number, because the mean of its divisors is an integer number (626139870).

Almost surely, 2^1252279739 is an apocalyptic number.

1252279739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252279739 is an equidigital number, since it uses as much as digits as its factorization.

1252279739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 1252279739 is about 35387.5647509121. The cubic root of 1252279739 is about 1077.8718204730.

The spelling of 1252279739 in words is "one billion, two hundred fifty-two million, two hundred seventy-nine thousand, seven hundred thirty-nine".