1255522240 has 56 divisors (see below), whose sum is σ = 3416820192. Its totient is φ = 430464000.

The previous prime is 1255522237. The next prime is 1255522241. The reversal of 1255522240 is 422255521.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1255522199 and 1255522208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255522241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278011 + ... + 282490.

Almost surely, 2^1255522240 is an apocalyptic number.

1255522240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255522240 is an abundant number, since it is smaller than the sum of its proper divisors (2161297952).

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

1255522240 is an equidigital number, since it uses as much as digits as its factorization.

1255522240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560525 (or 560515 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 1255522240 is about 35433.3492630883. The cubic root of 1255522240 is about 1078.8013221301.

Adding to 1255522240 its reverse (422255521), we get a palindrome (1677777761).

The spelling of 1255522240 in words is "one billion, two hundred fifty-five million, five hundred twenty-two thousand, two hundred forty".