1254715643 has 2 divisors, whose sum is σ = 1254715644. Its totient is φ = 1254715642.

The previous prime is 1254715613. The next prime is 1254715663. The reversal of 1254715643 is 3465174521.

It is a strong prime.

It is an emirp because it is prime and its reverse (3465174521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254715643 - 2⁸ = 1254715387 is a prime.

It is a super-2 number, since 2×1254715643² = 3148622689577806898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1254715597 and 1254715606.

It is not a weakly prime, because it can be changed into another prime (1254715603) 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, 627357821 + 627357822.

It is an arithmetic number, because the mean of its divisors is an integer number (627357822).

Almost surely, 2^1254715643 is an apocalyptic number.

1254715643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254715643 is an equidigital number, since it uses as much as digits as its factorization.

1254715643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 1254715643 is about 35421.9655439954. The cubic root of 1254715643 is about 1078.5702511356.

The spelling of 1254715643 in words is "one billion, two hundred fifty-four million, seven hundred fifteen thousand, six hundred forty-three".