2020651 has 4 divisors (see below), whose sum is σ = 2023704. Its totient is φ = 2017600.

The previous prime is 2020621. The next prime is 2020657. The reversal of 2020651 is 1560202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2020651 - 2¹⁵ = 1987883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020657) 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, 70 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (505926).

2^2020651 is an apocalyptic number.

2020651 is a deficient number, since it is larger than the sum of its proper divisors (3053).

2020651 is an equidigital number, since it uses as much as digits as its factorization.

2020651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2020651 is about 1421.4960429069. The cubic root of 2020651 is about 126.4242647896.

Adding to 2020651 its reverse (1560202), we get a palindrome (3580853).

The spelling of 2020651 in words is "two million, twenty thousand, six hundred fifty-one".