1253342040 has 64 divisors (see below), whose sum is σ = 3765420000. Its totient is φ = 333745152.

The previous prime is 1253342023. The next prime is 1253342047. The reversal of 1253342040 is 402433521.

It is a super-3 number, since 3×1253342040³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1253342040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253342047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80836 + ... + 95084.

Almost surely, 2^1253342040 is an apocalyptic number.

1253342040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253342040 is an abundant number, since it is smaller than the sum of its proper divisors (2512077960).

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

1253342040 is a wasteful number, since it uses less digits than its factorization.

1253342040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14996 (or 14992 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1253342040 is about 35402.5710930718. The cubic root of 1253342040 is about 1078.1765182859.

Adding to 1253342040 its reverse (402433521), we get a palindrome (1655775561).

The spelling of 1253342040 in words is "one billion, two hundred fifty-three million, three hundred forty-two thousand, forty".