2056387 has 4 divisors (see below), whose sum is σ = 2060856. Its totient is φ = 2051920.

The previous prime is 2056381. The next prime is 2056399. The reversal of 2056387 is 7836502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7836502 = 2 ⋅3918251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056387 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453 + ... + 2494.

It is an arithmetic number, because the mean of its divisors is an integer number (515214).

2^2056387 is an apocalyptic number.

2056387 is a deficient number, since it is larger than the sum of its proper divisors (4469).

2056387 is an equidigital number, since it uses as much as digits as its factorization.

2056387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2056387 is about 1434.0108088853. The cubic root of 2056387 is about 127.1652013441.

Subtracting from 2056387 its sum of digits (31), we obtain a square (2056356 = 1434²).

The spelling of 2056387 in words is "two million, fifty-six thousand, three hundred eighty-seven".