1253491241 has 2 divisors, whose sum is σ = 1253491242. Its totient is φ = 1253491240.

The previous prime is 1253491207. The next prime is 1253491247. The reversal of 1253491241 is 1421943521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056510016 + 196981225 = 32504^2 + 14035^2 .

It is an emirp because it is prime and its reverse (1421943521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253491241 - 2¹⁸ = 1253229097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253491198 and 1253491207.

It is not a weakly prime, because it can be changed into another prime (1253491247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626745620 + 626745621.

It is an arithmetic number, because the mean of its divisors is an integer number (626745621).

Almost surely, 2^1253491241 is an apocalyptic number.

It is an amenable number.

1253491241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253491241 is an equidigital number, since it uses as much as digits as its factorization.

1253491241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 1253491241 is about 35404.6782360750. The cubic root of 1253491241 is about 1078.2192995397.

The spelling of 1253491241 in words is "one billion, two hundred fifty-three million, four hundred ninety-one thousand, two hundred forty-one".