2158434 has 16 divisors (see below), whose sum is σ = 4796640. Its totient is φ = 719460.

The previous prime is 2158433. The next prime is 2158447. The reversal of 2158434 is 4348512.

2158434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 2158398 and 2158407.

It is not an unprimeable number, because it can be changed into a prime (2158433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19932 + ... + 20039.

It is an arithmetic number, because the mean of its divisors is an integer number (299790).

2^2158434 is an apocalyptic number.

2158434 is an abundant number, since it is smaller than the sum of its proper divisors (2638206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2158434 is a wasteful number, since it uses less digits than its factorization.

2158434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39982 (or 39976 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2158434 is about 1469.1609850524. The cubic root of 2158434 is about 129.2348345464.

It can be divided in two parts, 215 and 8434, that added together give a square (8649 = 93²).

The spelling of 2158434 in words is "two million, one hundred fifty-eight thousand, four hundred thirty-four".