1255555404 has 60 divisors (see below), whose sum is σ = 3300759000. Its totient is φ = 416161152.

The previous prime is 1255555393. The next prime is 1255555429. The reversal of 1255555404 is 4045555521.

1255555404 is a `hidden beast` number, since 12 + 55 + 55 + 540 + 4 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47172 + ... + 68820.

It is an arithmetic number, because the mean of its divisors is an integer number (55012650).

Almost surely, 2^1255555404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255555404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1650379500).

1255555404 is an abundant number, since it is smaller than the sum of its proper divisors (2045203596).

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

1255555404 is a wasteful number, since it uses less digits than its factorization.

1255555404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21844 (or 21833 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The square root of 1255555404 is about 35433.8172372100. The cubic root of 1255555404 is about 1078.8108207145.

The spelling of 1255555404 in words is "one billion, two hundred fifty-five million, five hundred fifty-five thousand, four hundred four".