2061641 has 8 divisors (see below), whose sum is σ = 2198664. Its totient is φ = 1926400.

The previous prime is 2061629. The next prime is 2061649. The reversal of 2061641 is 1461602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1428025 + 633616 = 1195^2 + 796^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061641 is a prime.

It is a super-2 number, since 2×2061641² = 8500727225762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2061649) 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 7 ways as a sum of consecutive naturals, for example, 2591 + ... + 3291.

It is an arithmetic number, because the mean of its divisors is an integer number (274833).

2^2061641 is an apocalyptic number.

It is an amenable number.

2061641 is a deficient number, since it is larger than the sum of its proper divisors (137023).

2061641 is a wasteful number, since it uses less digits than its factorization.

2061641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2061641 is about 1435.8415650760. The cubic root of 2061641 is about 127.2734101850.

The spelling of 2061641 in words is "two million, sixty-one thousand, six hundred forty-one".