1253111320 has 16 divisors (see below), whose sum is σ = 2819500560. Its totient is φ = 501244512.

The previous prime is 1253111311. The next prime is 1253111329. The reversal of 1253111320 is 231113521.

It is an interprime number because it is at equal distance from previous prime (1253111311) and next prime (1253111329).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253111329) 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, 15663852 + ... + 15663931.

It is an arithmetic number, because the mean of its divisors is an integer number (176218785).

Almost surely, 2^1253111320 is an apocalyptic number.

1253111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253111320 is an abundant number, since it is smaller than the sum of its proper divisors (1566389240).

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

1253111320 is a wasteful number, since it uses less digits than its factorization.

1253111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31327794 (or 31327790 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1253111320 is about 35399.3124227011. The cubic root of 1253111320 is about 1078.1103559392.

Adding to 1253111320 its reverse (231113521), we get a palindrome (1484224841).

The spelling of 1253111320 in words is "one billion, two hundred fifty-three million, one hundred eleven thousand, three hundred twenty".