1257133429 has 2 divisors, whose sum is σ = 1257133430. Its totient is φ = 1257133428.

The previous prime is 1257133373. The next prime is 1257133453. The reversal of 1257133429 is 9243317521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162946404 + 94187025 = 34102^2 + 9705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257133429 - 2⁷ = 1257133301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257133469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628566714 + 628566715.

It is an arithmetic number, because the mean of its divisors is an integer number (628566715).

Almost surely, 2^1257133429 is an apocalyptic number.

It is an amenable number.

1257133429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257133429 is an equidigital number, since it uses as much as digits as its factorization.

1257133429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 1257133429 is about 35456.0774621221. The cubic root of 1257133429 is about 1079.2625936191.

The spelling of 1257133429 in words is "one billion, two hundred fifty-seven million, one hundred thirty-three thousand, four hundred twenty-nine".