1253253444 has 48 divisors (see below), whose sum is σ = 3040464000. Its totient is φ = 401296896.

The previous prime is 1253253439. The next prime is 1253253457. The reversal of 1253253444 is 4443523521.

It is a super-2 number, since 2×1253253444² = 3141288389795722272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60204 + ... + 78300.

It is an arithmetic number, because the mean of its divisors is an integer number (63343000).

Almost surely, 2^1253253444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253253444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520232000).

1253253444 is an abundant number, since it is smaller than the sum of its proper divisors (1787210556).

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

1253253444 is a wasteful number, since it uses less digits than its factorization.

1253253444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18332 (or 18330 counting only the distinct ones).

The product of its digits is 57600, while the sum is 33.

The square root of 1253253444 is about 35401.3198059055. The cubic root of 1253253444 is about 1078.1511130428.

Adding to 1253253444 its reverse (4443523521), we get a palindrome (5696776965).

The spelling of 1253253444 in words is "one billion, two hundred fifty-three million, two hundred fifty-three thousand, four hundred forty-four".