1280752667 has 2 divisors, whose sum is σ = 1280752668. Its totient is φ = 1280752666.

The previous prime is 1280752639. The next prime is 1280752687. The reversal of 1280752667 is 7662570821.

It is a strong prime.

It is an emirp because it is prime and its reverse (7662570821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1280752667 - 2⁸ = 1280752411 is a prime.

It is a super-2 number, since 2×1280752667² = 3280654788055225778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1280752687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640376333 + 640376334.

It is an arithmetic number, because the mean of its divisors is an integer number (640376334).

Almost surely, 2^1280752667 is an apocalyptic number.

1280752667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280752667 is an equidigital number, since it uses as much as digits as its factorization.

1280752667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 1280752667 is about 35787.6049352286. The cubic root of 1280752667 is about 1085.9798229132.

The spelling of 1280752667 in words is "one billion, two hundred eighty million, seven hundred fifty-two thousand, six hundred sixty-seven".