1253131543 has 4 divisors (see below), whose sum is σ = 1265538888. Its totient is φ = 1240724200.

The previous prime is 1253131511. The next prime is 1253131553. The reversal of 1253131543 is 3451313521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3451313521 = 101 ⋅34171421.

It is a cyclic number.

It is not a de Polignac number, because 1253131543 - 2⁵ = 1253131511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253131553) 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, 6203521 + ... + 6203722.

It is an arithmetic number, because the mean of its divisors is an integer number (316384722).

Almost surely, 2^1253131543 is an apocalyptic number.

1253131543 is a deficient number, since it is larger than the sum of its proper divisors (12407345).

1253131543 is a wasteful number, since it uses less digits than its factorization.

1253131543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12407344.

The product of its digits is 5400, while the sum is 28.

The square root of 1253131543 is about 35399.5980626899. The cubic root of 1253131543 is about 1078.1161555060.

The spelling of 1253131543 in words is "one billion, two hundred fifty-three million, one hundred thirty-one thousand, five hundred forty-three".