1253235040 has 96 divisors (see below), whose sum is σ = 3107414016. Its totient is φ = 476720640.

The previous prime is 1253235031. The next prime is 1253235059. The reversal of 1253235040 is 405323521.

It is a junction number, because it is equal to n+sod(n) for n = 1253234996 and 1253235014.

It is a congruent number.

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, 701989 + ... + 703771.

It is an arithmetic number, because the mean of its divisors is an integer number (32368896).

Almost surely, 2^1253235040 is an apocalyptic number.

1253235040 is a gapful number since it is divisible by the number (10) 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 1253235040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553707008).

1253235040 is an abundant number, since it is smaller than the sum of its proper divisors (1854178976).

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

1253235040 is a wasteful number, since it uses less digits than its factorization.

1253235040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1253235040 is about 35401.0598711395. The cubic root of 1253235040 is about 1078.1458354750.

Adding to 1253235040 its reverse (405323521), we get a palindrome (1658558561).

The spelling of 1253235040 in words is "one billion, two hundred fifty-three million, two hundred thirty-five thousand, forty".