2162661 has 4 divisors (see below), whose sum is σ = 2883552. Its totient is φ = 1441772.

The previous prime is 2162659. The next prime is 2162663. The reversal of 2162661 is 1662612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2162659) and next prime (2162663).

It is a cyclic number.

It is not a de Polignac number, because 2162661 - 2¹ = 2162659 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360441 + ... + 360446.

It is an arithmetic number, because the mean of its divisors is an integer number (720888).

2^2162661 is an apocalyptic number.

It is an amenable number.

2162661 is a deficient number, since it is larger than the sum of its proper divisors (720891).

2162661 is an equidigital number, since it uses as much as digits as its factorization.

2162661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720890.

The product of its digits is 864, while the sum is 24.

The square root of 2162661 is about 1470.5988576087. The cubic root of 2162661 is about 129.3191424954.

The spelling of 2162661 in words is "two million, one hundred sixty-two thousand, six hundred sixty-one".