2156430 has 16 divisors (see below), whose sum is σ = 5175504. Its totient is φ = 575040.

The previous prime is 2156417. The next prime is 2156437. The reversal of 2156430 is 346512.

It is a happy number.

2156430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2156397 and 2156406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156437) 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, 35911 + ... + 35970.

It is an arithmetic number, because the mean of its divisors is an integer number (323469).

2^2156430 is an apocalyptic number.

2156430 is an abundant number, since it is smaller than the sum of its proper divisors (3019074).

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

2156430 is a wasteful number, since it uses less digits than its factorization.

2156430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71891.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2156430 is about 1468.4788047500. The cubic root of 2156430 is about 129.1948260955.

It can be divided in two parts, 21 and 56430, that multiplied together give a triangular number (1185030 = T₁₅₃₉).

The spelling of 2156430 in words is "two million, one hundred fifty-six thousand, four hundred thirty".