2158834 has 4 divisors (see below), whose sum is σ = 3238254. Its totient is φ = 1079416.

The previous prime is 2158831. The next prime is 2158841. The reversal of 2158834 is 4388512.

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

It can be written as a sum of positive squares in only one way, i.e., 2093809 + 65025 = 1447^2 + 255^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2158796 and 2158805.

It is not an unprimeable number, because it can be changed into a prime (2158831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539707 + ... + 539710.

2^2158834 is an apocalyptic number.

2158834 is a deficient number, since it is larger than the sum of its proper divisors (1079420).

2158834 is a wasteful number, since it uses less digits than its factorization.

2158834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079419.

The product of its digits is 7680, while the sum is 31.

The square root of 2158834 is about 1469.2971108663. The cubic root of 2158834 is about 129.2428173000.

It can be divided in two parts, 2158 and 834, that added together give a palindrome (2992).

The spelling of 2158834 in words is "two million, one hundred fifty-eight thousand, eight hundred thirty-four".