1257252251 has 2 divisors, whose sum is σ = 1257252252. Its totient is φ = 1257252250.

The previous prime is 1257252239. The next prime is 1257252257. The reversal of 1257252251 is 1522527521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1257252251 - 2¹⁸ = 1256990107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1257252257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628626125 + 628626126.

It is an arithmetic number, because the mean of its divisors is an integer number (628626126).

Almost surely, 2^1257252251 is an apocalyptic number.

1257252251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257252251 is an equidigital number, since it uses as much as digits as its factorization.

1257252251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 32.

The square root of 1257252251 is about 35457.7530449971. The cubic root of 1257252251 is about 1079.2965958703.

Adding to 1257252251 its reverse (1522527521), we get a palindrome (2779779772).

The spelling of 1257252251 in words is "one billion, two hundred fifty-seven million, two hundred fifty-two thousand, two hundred fifty-one".