1256146563 has 32 divisors (see below), whose sum is σ = 2018649600. Its totient is φ = 678744576.

The previous prime is 1256146537. The next prime is 1256146579. The reversal of 1256146563 is 3656416521.

1256146563 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1256146563 - 2¹² = 1256142467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256146523) 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, 233953 + ... + 239261.

It is an arithmetic number, because the mean of its divisors is an integer number (63082800).

Almost surely, 2^1256146563 is an apocalyptic number.

1256146563 is a deficient number, since it is larger than the sum of its proper divisors (762503037).

1256146563 is a wasteful number, since it uses less digits than its factorization.

1256146563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931.

The product of its digits is 129600, while the sum is 39.

The square root of 1256146563 is about 35442.1579901676. The cubic root of 1256146563 is about 1078.9801079900.

The spelling of 1256146563 in words is "one billion, two hundred fifty-six million, one hundred forty-six thousand, five hundred sixty-three".