1252251961 has 2 divisors, whose sum is σ = 1252251962. Its totient is φ = 1252251960.

The previous prime is 1252251947. The next prime is 1252252007. The reversal of 1252251961 is 1691522521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1250046736 + 2205225 = 35356^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252251961 - 2¹⁵ = 1252219193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252251361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626125980 + 626125981.

It is an arithmetic number, because the mean of its divisors is an integer number (626125981).

Almost surely, 2^1252251961 is an apocalyptic number.

It is an amenable number.

1252251961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252251961 is an equidigital number, since it uses as much as digits as its factorization.

1252251961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 34.

The square root of 1252251961 is about 35387.1722662323. The cubic root of 1252251961 is about 1077.8638506496.

The spelling of 1252251961 in words is "one billion, two hundred fifty-two million, two hundred fifty-one thousand, nine hundred sixty-one".