1259663256 has 144 divisors (see below), whose sum is σ = 3595278960. Its totient is φ = 398334720.

The previous prime is 1259663239. The next prime is 1259663257. The reversal of 1259663256 is 6523669521.

1259663256 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 6 + 632 + 5 + 6 = 666.

1259663256 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1259663257) 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, 4299046 + ... + 4299338.

It is an arithmetic number, because the mean of its divisors is an integer number (24967215).

Almost surely, 2^1259663256 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 1259663256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797639480).

1259663256 is an abundant number, since it is smaller than the sum of its proper divisors (2335615704).

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

1259663256 is a wasteful number, since it uses less digits than its factorization.

1259663256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 398 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 1259663256 is about 35491.7350378930. The cubic root of 1259663256 is about 1079.9860697792.

The spelling of 1259663256 in words is "one billion, two hundred fifty-nine million, six hundred sixty-three thousand, two hundred fifty-six".