2156424 has 32 divisors (see below), whose sum is σ = 5676000. Its totient is φ = 680832.

The previous prime is 2156417. The next prime is 2156437. The reversal of 2156424 is 4246512.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 2156394 and 2156403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1909 + ... + 2820.

It is an arithmetic number, because the mean of its divisors is an integer number (177375).

2^2156424 is an apocalyptic number.

2156424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2156424 is an abundant number, since it is smaller than the sum of its proper divisors (3519576).

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

2156424 is a wasteful number, since it uses less digits than its factorization.

2156424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757 (or 4753 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 2156424 is about 1468.4767618182. The cubic root of 2156424 is about 129.1947062725.

The spelling of 2156424 in words is "two million, one hundred fifty-six thousand, four hundred twenty-four".