1253241389 has 2 divisors, whose sum is σ = 1253241390. Its totient is φ = 1253241388.

The previous prime is 1253241373. The next prime is 1253241391. The reversal of 1253241389 is 9831423521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969824164 + 283417225 = 31142^2 + 16835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253241389 - 2⁴ = 1253241373 is a prime.

It is a super-2 number, since 2×1253241389² = 3141227958205298642, which contains 22 as substring.

Together with 1253241391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253241289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626620694 + 626620695.

It is an arithmetic number, because the mean of its divisors is an integer number (626620695).

Almost surely, 2^1253241389 is an apocalyptic number.

It is an amenable number.

1253241389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253241389 is an equidigital number, since it uses as much as digits as its factorization.

1253241389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 1253241389 is about 35401.1495434823. The cubic root of 1253241389 is about 1078.1476561327.

The spelling of 1253241389 in words is "one billion, two hundred fifty-three million, two hundred forty-one thousand, three hundred eighty-nine".