1255235422400 has 84 divisors (see below), whose sum is σ = 3089778954288. Its totient is φ = 501912867840.

The previous prime is 1255235422391. The next prime is 1255235422421. The reversal of 1255235422400 is 42245325521.

It is a happy number.

It is a super-3 number, since 3×1255235422400³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4334957 + ... + 4615443.

Almost surely, 2^{1255235422400} is an apocalyptic number.

1255235422400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255235422400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544889477144).

1255235422400 is an abundant number, since it is smaller than the sum of its proper divisors (1834543531888).

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

1255235422400 is a wasteful number, since it uses less digits than its factorization.

1255235422400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283306 (or 283291 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 1255235422400 in words is "one trillion, two hundred fifty-five billion, two hundred thirty-five million, four hundred twenty-two thousand, four hundred".