1253443431240 has 384 divisors, whose sum is σ = 5469572908800. Its totient is φ = 240420648960.

The previous prime is 1253443431239. The next prime is 1253443431313. The reversal of 1253443431240 is 421343443521.

1253443431240 is a `hidden beast` number, since 1 + 2 + 53 + 443 + 43 + 124 + 0 = 666.

It is a super-2 number, since 2×1253443431240² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1253443431195 and 1253443431204.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1378795 + ... + 2099514.

It is an arithmetic number, because the mean of its divisors is an integer number (14243679450).

Almost surely, 2^{1253443431240} is an apocalyptic number.

1253443431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253443431240 is an abundant number, since it is smaller than the sum of its proper divisors (4216129477560).

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

1253443431240 is a wasteful number, since it uses less digits than its factorization.

1253443431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478357 (or 3478350 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 1253443431240 its reverse (421343443521), we get a palindrome (1674786874761).

The spelling of 1253443431240 in words is "one trillion, two hundred fifty-three billion, four hundred forty-three million, four hundred thirty-one thousand, two hundred forty".