1252727321 has 2 divisors, whose sum is σ = 1252727322. Its totient is φ = 1252727320.

The previous prime is 1252727309. The next prime is 1252727347. The reversal of 1252727321 is 1237272521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994771600 + 257955721 = 31540^2 + 16061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252727321 - 2¹⁸ = 1252465177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1452727321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626363660 + 626363661.

It is an arithmetic number, because the mean of its divisors is an integer number (626363661).

Almost surely, 2^1252727321 is an apocalyptic number.

It is an amenable number.

1252727321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252727321 is an equidigital number, since it uses as much as digits as its factorization.

1252727321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 1252727321 is about 35393.8881870868. Note that the first 3 decimals coincide. The cubic root of 1252727321 is about 1078.0002205807. Note that the first 3 decimals are identical.

Adding to 1252727321 its reverse (1237272521), we get a palindrome (2489999842).

The spelling of 1252727321 in words is "one billion, two hundred fifty-two million, seven hundred twenty-seven thousand, three hundred twenty-one".