1255422120 has 64 divisors (see below), whose sum is σ = 3987817920. Its totient is φ = 315085824.

The previous prime is 1255422089. The next prime is 1255422121. The reversal of 1255422120 is 212245521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1255422121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 305662 + ... + 309741.

It is an arithmetic number, because the mean of its divisors is an integer number (62309655).

Almost surely, 2^1255422120 is an apocalyptic number.

1255422120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255422120 is an abundant number, since it is smaller than the sum of its proper divisors (2732395800).

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

1255422120 is a wasteful number, since it uses less digits than its factorization.

1255422120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615434 (or 615430 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1255422120 is about 35431.9364415777. The cubic root of 1255422120 is about 1078.7726454949.

Adding to 1255422120 its reverse (212245521), we get a palindrome (1467667641).

It can be divided in two parts, 125 and 5422120, that added together give a palindrome (5422245).

The spelling of 1255422120 in words is "one billion, two hundred fifty-five million, four hundred twenty-two thousand, one hundred twenty".