1253340220 has 96 divisors (see below), whose sum is σ = 2978519040. Its totient is φ = 438992640.

The previous prime is 1253340203. The next prime is 1253340223. The reversal of 1253340220 is 220433521.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1253340191 and 1253340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253340223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870261 + ... + 871699.

It is an arithmetic number, because the mean of its divisors is an integer number (31026240).

Almost surely, 2^1253340220 is an apocalyptic number.

1253340220 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 1253340220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1489259520).

1253340220 is an abundant number, since it is smaller than the sum of its proper divisors (1725178820).

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

1253340220 is a wasteful number, since it uses less digits than its factorization.

1253340220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1253340220 is about 35402.5453887146. The cubic root of 1253340220 is about 1078.1759964060.

Adding to 1253340220 its reverse (220433521), we get a palindrome (1473773741).

The spelling of 1253340220 in words is "one billion, two hundred fifty-three million, three hundred forty thousand, two hundred twenty".