1253135423 has 2 divisors, whose sum is σ = 1253135424. Its totient is φ = 1253135422.

The previous prime is 1253135419. The next prime is 1253135431. The reversal of 1253135423 is 3245313521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1253135423 - 2² = 1253135419 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253135483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626567711 + 626567712.

It is an arithmetic number, because the mean of its divisors is an integer number (626567712).

Almost surely, 2^1253135423 is an apocalyptic number.

1253135423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253135423 is an equidigital number, since it uses as much as digits as its factorization.

1253135423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 29.

The square root of 1253135423 is about 35399.6528655296. The cubic root of 1253135423 is about 1078.1172682081.

Adding to 1253135423 its reverse (3245313521), we get a palindrome (4498448944).

The spelling of 1253135423 in words is "one billion, two hundred fifty-three million, one hundred thirty-five thousand, four hundred twenty-three".