1257344461 has 2 divisors, whose sum is σ = 1257344462. Its totient is φ = 1257344460.

The previous prime is 1257344401. The next prime is 1257344483. The reversal of 1257344461 is 1644437521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231588836 + 25755625 = 35094^2 + 5075^2 .

It is an emirp because it is prime and its reverse (1644437521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1257344461 - 2⁹ = 1257343949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1257344461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257344401) 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, 628672230 + 628672231.

It is an arithmetic number, because the mean of its divisors is an integer number (628672231).

Almost surely, 2^1257344461 is an apocalyptic number.

It is an amenable number.

1257344461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257344461 is an equidigital number, since it uses as much as digits as its factorization.

1257344461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 1257344461 is about 35459.0533009555. The cubic root of 1257344461 is about 1079.3229813221.

The spelling of 1257344461 in words is "one billion, two hundred fifty-seven million, three hundred forty-four thousand, four hundred sixty-one".