2129641 has 6 divisors (see below), whose sum is σ = 2262590. Its totient is φ = 2004096.

The previous prime is 2129627. The next prime is 2129671. The reversal of 2129641 is 1469212.

It can be written as a sum of positive squares in 3 ways, for example, as 1390041 + 739600 = 1179^2 + 860^2 .

It is not a de Polignac number, because 2129641 - 2⁷ = 2129513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129671) 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, 3396 + ... + 3973.

2^2129641 is an apocalyptic number.

It is an amenable number.

2129641 is a deficient number, since it is larger than the sum of its proper divisors (132949).

2129641 is an equidigital number, since it uses as much as digits as its factorization.

2129641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403 (or 7386 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 2129641 is about 1459.3289553764. The cubic root of 2129641 is about 128.6576061285.

The spelling of 2129641 in words is "two million, one hundred twenty-nine thousand, six hundred forty-one".