1257141229 has 2 divisors, whose sum is σ = 1257141230. Its totient is φ = 1257141228.

The previous prime is 1257141187. The next prime is 1257141239. The reversal of 1257141229 is 9221417521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 752240329 + 504900900 = 27427^2 + 22470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257141229 - 2¹⁹ = 1256616941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1257141194 and 1257141203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257141239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628570614 + 628570615.

It is an arithmetic number, because the mean of its divisors is an integer number (628570615).

Almost surely, 2^1257141229 is an apocalyptic number.

It is an amenable number.

1257141229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257141229 is an equidigital number, since it uses as much as digits as its factorization.

1257141229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 1257141229 is about 35456.1874571985. The cubic root of 1257141229 is about 1079.2648257425.

The spelling of 1257141229 in words is "one billion, two hundred fifty-seven million, one hundred forty-one thousand, two hundred twenty-nine".