1267725379 has 2 divisors, whose sum is σ = 1267725380. Its totient is φ = 1267725378.

The previous prime is 1267725359. The next prime is 1267725419. The reversal of 1267725379 is 9735277621.

1267725379 is nontrivially palindromic in base 7.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1267725379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267725359) 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, 633862689 + 633862690.

It is an arithmetic number, because the mean of its divisors is an integer number (633862690).

Almost surely, 2^1267725379 is an apocalyptic number.

1267725379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267725379 is an equidigital number, since it uses as much as digits as its factorization.

1267725379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 49.

The square root of 1267725379 is about 35605.1313577130. The cubic root of 1267725379 is about 1082.2852214842.

The spelling of 1267725379 in words is "one billion, two hundred sixty-seven million, seven hundred twenty-five thousand, three hundred seventy-nine".