1295543256 has 128 divisors (see below), whose sum is σ = 3824271360. Its totient is φ = 358041600.

The previous prime is 1295543251. The next prime is 1295543269. The reversal of 1295543256 is 6523455921.

It is a happy number.

1295543256 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1295543251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 874036 + ... + 875516.

It is an arithmetic number, because the mean of its divisors is an integer number (29877120).

Almost surely, 2^1295543256 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 1295543256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912135680).

1295543256 is an abundant number, since it is smaller than the sum of its proper divisors (2528728104).

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

1295543256 is a wasteful number, since it uses less digits than its factorization.

1295543256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1661 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The square root of 1295543256 is about 35993.6557743167. The cubic root of 1295543256 is about 1090.1442605686.

The spelling of 1295543256 in words is "one billion, two hundred ninety-five million, five hundred forty-three thousand, two hundred fifty-six".