2156427 has 24 divisors (see below), whose sum is σ = 3835104. Its totient is φ = 1137024.

The previous prime is 2156417. The next prime is 2156437. The reversal of 2156427 is 7246512.

2156427 is a `hidden beast` number, since 2 + 15 + 642 + 7 = 666.

2156427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2156417) and next prime (2156437).

It is not a de Polignac number, because 2156427 - 2⁷ = 2156299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2156427.

It is not an unprimeable number, because it can be changed into a prime (2156417) 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 23 ways as a sum of consecutive naturals, for example, 498 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (159796).

2^2156427 is an apocalyptic number.

2156427 is a deficient number, since it is larger than the sum of its proper divisors (1678677).

2156427 is a wasteful number, since it uses less digits than its factorization.

2156427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659 (or 2656 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2156427 is about 1468.4777832844. The cubic root of 2156427 is about 129.1947661840.

The spelling of 2156427 in words is "two million, one hundred fifty-six thousand, four hundred twenty-seven".