2132661 has 4 divisors (see below), whose sum is σ = 2843552. Its totient is φ = 1421772.

The previous prime is 2132659. The next prime is 2132699. The reversal of 2132661 is 1662312.

It is a happy number.

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 not a de Polignac number, because 2132661 - 2¹ = 2132659 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2132461) 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, 355441 + ... + 355446.

It is an arithmetic number, because the mean of its divisors is an integer number (710888).

2^2132661 is an apocalyptic number.

It is an amenable number.

2132661 is a deficient number, since it is larger than the sum of its proper divisors (710891).

2132661 is an equidigital number, since it uses as much as digits as its factorization.

2132661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710890.

The product of its digits is 432, while the sum is 21.

The square root of 2132661 is about 1460.3633109607. The cubic root of 2132661 is about 128.7183929703.

Adding to 2132661 its reverse (1662312), we get a palindrome (3794973).

The spelling of 2132661 in words is "two million, one hundred thirty-two thousand, six hundred sixty-one".