1250340257 has 2 divisors, whose sum is σ = 1250340258. Its totient is φ = 1250340256.

The previous prime is 1250340251. The next prime is 1250340319. The reversal of 1250340257 is 7520430521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245807616 + 4532641 = 35296^2 + 2129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250340257 - 2¹² = 1250336161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1250340251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625170128 + 625170129.

It is an arithmetic number, because the mean of its divisors is an integer number (625170129).

Almost surely, 2^1250340257 is an apocalyptic number.

It is an amenable number.

1250340257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250340257 is an equidigital number, since it uses as much as digits as its factorization.

1250340257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 1250340257 is about 35360.1506925522. The cubic root of 1250340257 is about 1077.3150776799.

Adding to 1250340257 its reverse (7520430521), we get a palindrome (8770770778).

The spelling of 1250340257 in words is "one billion, two hundred fifty million, three hundred forty thousand, two hundred fifty-seven".