1255606740 has 108 divisors (see below), whose sum is σ = 4046059836. Its totient is φ = 315119616.

The previous prime is 1255606721. The next prime is 1255606747. The reversal of 1255606740 is 476065521.

It is a happy number.

1255606740 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 606 + 7 + 40 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 131882256 + 1123724484 = 11484^2 + 33522^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1255606695 and 1255606704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255606747) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39952 + ... + 64088.

It is an arithmetic number, because the mean of its divisors is an integer number (37463517).

Almost surely, 2^1255606740 is an apocalyptic number.

1255606740 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 1255606740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023029918).

1255606740 is an abundant number, since it is smaller than the sum of its proper divisors (2790453096).

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

1255606740 is a wasteful number, since it uses less digits than its factorization.

1255606740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24186 (or 24164 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1255606740 is about 35434.5416225468. The cubic root of 1255606740 is about 1078.8255236572.

The spelling of 1255606740 in words is "one billion, two hundred fifty-five million, six hundred six thousand, seven hundred forty".