1253135532 has 54 divisors (see below), whose sum is σ = 3217428004. Its totient is φ = 379329280.

The previous prime is 1253135489. The next prime is 1253135579. The reversal of 1253135532 is 2355313521.

It is a self number, because there is not a number n which added to its sum of digits gives 1253135532.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1348444 + ... + 1349372.

Almost surely, 2^1253135532 is an apocalyptic number.

1253135532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253135532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608714002).

1253135532 is an abundant number, since it is smaller than the sum of its proper divisors (1964292472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253135532 is an equidigital number, since it uses as much as digits as its factorization.

1253135532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887 (or 945 counting only the distinct ones).

The product of its digits is 13500, while the sum is 30.

The square root of 1253135532 is about 35399.6544050927. The cubic root of 1253135532 is about 1078.1172994669.

The spelling of 1253135532 in words is "one billion, two hundred fifty-three million, one hundred thirty-five thousand, five hundred thirty-two".