1255142424440 has 64 divisors (see below), whose sum is σ = 2990573784000. Its totient is φ = 472463915008.

The previous prime is 1255142424409. The next prime is 1255142424451. The reversal of 1255142424440 is 444242415521.

It is a super-2 number, since 2×1255142424440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1255142424394 and 1255142424403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5405861 + ... + 5633259.

It is an arithmetic number, because the mean of its divisors is an integer number (46727715375).

Almost surely, 2^{1255142424440} is an apocalyptic number.

1255142424440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255142424440 is an abundant number, since it is smaller than the sum of its proper divisors (1735431359560).

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

1255142424440 is a wasteful number, since it uses less digits than its factorization.

1255142424440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235544 (or 235540 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 38.

Adding to 1255142424440 its reverse (444242415521), we get a palindrome (1699384839961).

The spelling of 1255142424440 in words is "one trillion, two hundred fifty-five billion, one hundred forty-two million, four hundred twenty-four thousand, four hundred forty".