2158424 has 16 divisors (see below), whose sum is σ = 4114320. Its totient is φ = 1061280.

The previous prime is 2158423. The next prime is 2158427. The reversal of 2158424 is 4248512.

It is a happy number.

2158424 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2158393 and 2158402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158423) 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 3 ways as a sum of consecutive naturals, for example, 1724 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (257145).

2^2158424 is an apocalyptic number.

It is an amenable number.

2158424 is a deficient number, since it is larger than the sum of its proper divisors (1955896).

2158424 is a wasteful number, since it uses less digits than its factorization.

2158424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490 (or 4486 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 2158424 is about 1469.1575817454. The cubic root of 2158424 is about 129.2346349649.

It can be divided in two parts, 215842 and 4, that multiplied together give a palindrome (863368).

The spelling of 2158424 in words is "two million, one hundred fifty-eight thousand, four hundred twenty-four".