1255140473400 has 480 divisors, whose sum is σ = 4802741689680. Its totient is φ = 301259520000.

The previous prime is 1255140473399. The next prime is 1255140473429. The reversal of 1255140473400 is 43740415521.

1255140473400 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 140 + 473 + 40 + 0 = 666.

It is a super-2 number, since 2×1255140473400² (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 congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 17963332 + ... + 18033068.

Almost surely, 2^{1255140473400} is an apocalyptic number.

1255140473400 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 1255140473400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2401370844840).

1255140473400 is an abundant number, since it is smaller than the sum of its proper divisors (3547601216280).

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

1255140473400 is a wasteful number, since it uses less digits than its factorization.

1255140473400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69877 (or 69859 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 1255140473400 its reverse (43740415521), we get a palindrome (1298880888921).

The spelling of 1255140473400 in words is "one trillion, two hundred fifty-five billion, one hundred forty million, four hundred seventy-three thousand, four hundred".