1267348057 has 2 divisors, whose sum is σ = 1267348058. Its totient is φ = 1267348056.

The previous prime is 1267347989. The next prime is 1267348067. The reversal of 1267348057 is 7508437621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910289241 + 357058816 = 30171^2 + 18896^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267348057 - 2¹⁹ = 1266823769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267348067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633674028 + 633674029.

It is an arithmetic number, because the mean of its divisors is an integer number (633674029).

Almost surely, 2^1267348057 is an apocalyptic number.

It is an amenable number.

1267348057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267348057 is an equidigital number, since it uses as much as digits as its factorization.

1267348057 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 43.

The square root of 1267348057 is about 35599.8322608408. The cubic root of 1267348057 is about 1082.1778347811.

The spelling of 1267348057 in words is "one billion, two hundred sixty-seven million, three hundred forty-eight thousand, fifty-seven".