1253135023 has 4 divisors (see below), whose sum is σ = 1432154320. Its totient is φ = 1074115728.

The previous prime is 1253134999. The next prime is 1253135089. The reversal of 1253135023 is 3205313521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1253135023 - 2⁹ = 1253134511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253135423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89509638 + ... + 89509651.

It is an arithmetic number, because the mean of its divisors is an integer number (358038580).

Almost surely, 2^1253135023 is an apocalyptic number.

1253135023 is a deficient number, since it is larger than the sum of its proper divisors (179019297).

1253135023 is an equidigital number, since it uses as much as digits as its factorization.

1253135023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179019296.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1253135023 is about 35399.6472157563. The cubic root of 1253135023 is about 1078.1171534966.

Adding to 1253135023 its reverse (3205313521), we get a palindrome (4458448544).

The spelling of 1253135023 in words is "one billion, two hundred fifty-three million, one hundred thirty-five thousand, twenty-three".