1253140387 has 2 divisors, whose sum is σ = 1253140388. Its totient is φ = 1253140386.

The previous prime is 1253140337. The next prime is 1253140403. The reversal of 1253140387 is 7830413521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253140387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253140337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626570193 + 626570194.

It is an arithmetic number, because the mean of its divisors is an integer number (626570194).

Almost surely, 2^1253140387 is an apocalyptic number.

1253140387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253140387 is an equidigital number, since it uses as much as digits as its factorization.

1253140387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1253140387 is about 35399.7229791421. The cubic root of 1253140387 is about 1078.1186917752.

The spelling of 1253140387 in words is "one billion, two hundred fifty-three million, one hundred forty thousand, three hundred eighty-seven".