1256200487 has 4 divisors (see below), whose sum is σ = 1274949816. Its totient is φ = 1237451160.

The previous prime is 1256200471. The next prime is 1256200513. The reversal of 1256200487 is 7840026521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7840026521 = 409 ⋅19168769.

It is a cyclic number.

It is not a de Polignac number, because 1256200487 - 2⁴ = 1256200471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256200417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9374564 + ... + 9374697.

It is an arithmetic number, because the mean of its divisors is an integer number (318737454).

Almost surely, 2^1256200487 is an apocalyptic number.

1256200487 is a deficient number, since it is larger than the sum of its proper divisors (18749329).

1256200487 is an equidigital number, since it uses as much as digits as its factorization.

1256200487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18749328.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1256200487 is about 35442.9187144626. The cubic root of 1256200487 is about 1078.9955472953.

The spelling of 1256200487 in words is "one billion, two hundred fifty-six million, two hundred thousand, four hundred eighty-seven".