2156534 has 8 divisors (see below), whose sum is σ = 3241920. Its totient is φ = 1075896.

The previous prime is 2156521. The next prime is 2156537. The reversal of 2156534 is 4356512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (405240).

2^2156534 is an apocalyptic number.

2156534 is a deficient number, since it is larger than the sum of its proper divisors (1085386).

2156534 is a wasteful number, since it uses less digits than its factorization.

2156534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374.

The product of its digits is 3600, while the sum is 26.

The square root of 2156534 is about 1468.5142151168. The cubic root of 2156534 is about 129.1969029920.

The spelling of 2156534 in words is "two million, one hundred fifty-six thousand, five hundred thirty-four".