1252231549 has 2 divisors, whose sum is σ = 1252231550. Its totient is φ = 1252231548.

The previous prime is 1252231531. The next prime is 1252231559. The reversal of 1252231549 is 9451322521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1251036900 + 1194649 = 35370^2 + 1093^2 .

It is an emirp because it is prime and its reverse (9451322521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1252231549 - 2²⁷ = 1118013821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252231559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626115774 + 626115775.

It is an arithmetic number, because the mean of its divisors is an integer number (626115775).

Almost surely, 2^1252231549 is an apocalyptic number.

It is an amenable number.

1252231549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252231549 is an equidigital number, since it uses as much as digits as its factorization.

1252231549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 1252231549 is about 35386.8838554626. The cubic root of 1252231549 is about 1077.8579941402.

The spelling of 1252231549 in words is "one billion, two hundred fifty-two million, two hundred thirty-one thousand, five hundred forty-nine".