1253311240 has 16 divisors (see below), whose sum is σ = 2819950380. Its totient is φ = 501324480.

The previous prime is 1253311219. The next prime is 1253311243. The reversal of 1253311240 is 421133521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1164310884 + 89000356 = 34122^2 + 9434^2 .

It is not an unprimeable number, because it can be changed into a prime (1253311243) 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, 15666351 + ... + 15666430.

Almost surely, 2^1253311240 is an apocalyptic number.

1253311240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253311240 is an abundant number, since it is smaller than the sum of its proper divisors (1566639140).

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

1253311240 is a wasteful number, since it uses less digits than its factorization.

1253311240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31332792 (or 31332788 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1253311240 is about 35402.1360937444. The cubic root of 1253311240 is about 1078.1676864034.

Adding to 1253311240 its reverse (421133521), we get a palindrome (1674444761).

The spelling of 1253311240 in words is "one billion, two hundred fifty-three million, three hundred eleven thousand, two hundred forty".