1256528473 has 16 divisors (see below), whose sum is σ = 1311296400. Its totient is φ = 1203019776.

The previous prime is 1256528467. The next prime is 1256528477. The reversal of 1256528473 is 3748256521.

It can be written as a sum of positive squares in 8 ways, for example, as 19740249 + 1236788224 = 4443^2 + 35168^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1256528473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256528477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621961 + ... + 623977.

It is an arithmetic number, because the mean of its divisors is an integer number (81956025).

Almost surely, 2^1256528473 is an apocalyptic number.

It is an amenable number.

1256528473 is a deficient number, since it is larger than the sum of its proper divisors (54767927).

1256528473 is a wasteful number, since it uses less digits than its factorization.

1256528473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 403200, while the sum is 43.

The square root of 1256528473 is about 35447.5453734106. The cubic root of 1256528473 is about 1079.0894454275.

The spelling of 1256528473 in words is "one billion, two hundred fifty-six million, five hundred twenty-eight thousand, four hundred seventy-three".