2134681 has 4 divisors (see below), whose sum is σ = 2175012. Its totient is φ = 2094352.

The previous prime is 2134637. The next prime is 2134697. The reversal of 2134681 is 1864312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 336400 = 1341^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134681 - 2²¹ = 37529 is a prime.

It is a super-2 number, since 2×2134681² = 9113725943522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2134621) 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, 20086 + ... + 20191.

It is an arithmetic number, because the mean of its divisors is an integer number (543753).

2^2134681 is an apocalyptic number.

It is an amenable number.

2134681 is a deficient number, since it is larger than the sum of its proper divisors (40331).

2134681 is an equidigital number, since it uses as much as digits as its factorization.

2134681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40330.

The product of its digits is 1152, while the sum is 25.

The square root of 2134681 is about 1461.0547559897. The cubic root of 2134681 is about 128.7590196968.

Adding to 2134681 its reverse (1864312), we get a palindrome (3998993).

The spelling of 2134681 in words is "two million, one hundred thirty-four thousand, six hundred eighty-one".