1252251361 has 2 divisors, whose sum is σ = 1252251362. Its totient is φ = 1252251360.

The previous prime is 1252251317. The next prime is 1252251367. The reversal of 1252251361 is 1631522521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994456225 + 257795136 = 31535^2 + 16056^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252251361 - 2⁹ = 1252250849 is a prime.

It is a super-2 number, since 2×1252251361² = 3136266942252704642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1252251367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626125680 + 626125681.

It is an arithmetic number, because the mean of its divisors is an integer number (626125681).

Almost surely, 2^1252251361 is an apocalyptic number.

It is an amenable number.

1252251361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252251361 is an equidigital number, since it uses as much as digits as its factorization.

1252251361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 1252251361 is about 35387.1637885830. The cubic root of 1252251361 is about 1077.8636785015.

Adding to 1252251361 its reverse (1631522521), we get a palindrome (2883773882).

The spelling of 1252251361 in words is "one billion, two hundred fifty-two million, two hundred fifty-one thousand, three hundred sixty-one".