2051787 has 6 divisors (see below), whose sum is σ = 2739028. Its totient is φ = 1366204.

The previous prime is 2051773. The next prime is 2051801. The reversal of 2051787 is 7871502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2051773) and next prime (2051801).

It is not a de Polignac number, because 2051787 - 2¹⁴ = 2035403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2068 + ... + 2894.

2^2051787 is an apocalyptic number.

2051787 is a deficient number, since it is larger than the sum of its proper divisors (687241).

2051787 is an frugal number, since it uses more digits than its factorization.

2051787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 2051787 is about 1432.4060178595. The cubic root of 2051787 is about 127.0703105411.

The spelling of 2051787 in words is "two million, fifty-one thousand, seven hundred eighty-seven".