1253442340 has 24 divisors (see below), whose sum is σ = 2703371832. Its totient is φ = 487825920.

The previous prime is 1253442277. The next prime is 1253442367. The reversal of 1253442340 is 432443521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 551404324 + 702038016 = 23482^2 + 26496^2 .

It is a super-2 number, since 2×1253442340² = 3142235399409351200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1253442299 and 1253442308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846181 + ... + 847660.

It is an arithmetic number, because the mean of its divisors is an integer number (112640493).

Almost surely, 2^1253442340 is an apocalyptic number.

1253442340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253442340 is an abundant number, since it is smaller than the sum of its proper divisors (1449929492).

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

1253442340 is a wasteful number, since it uses less digits than its factorization.

1253442340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693887 (or 1693885 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1253442340 is about 35403.9876285144. The cubic root of 1253442340 is about 1078.2052782511.

Adding to 1253442340 its reverse (432443521), we get a palindrome (1685885861).

The spelling of 1253442340 in words is "one billion, two hundred fifty-three million, four hundred forty-two thousand, three hundred forty".