2161542 has 8 divisors (see below), whose sum is σ = 4323096. Its totient is φ = 720512.

The previous prime is 2161513. The next prime is 2161553. The reversal of 2161542 is 2451612.

2161542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

2161542 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 180123 + ... + 180134.

It is an arithmetic number, because the mean of its divisors is an integer number (540387).

2^2161542 is an apocalyptic number.

2161542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2161542 is a wasteful number, since it uses less digits than its factorization.

2161542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360262.

The product of its digits is 480, while the sum is 21.

The square root of 2161542 is about 1470.2183511302. The cubic root of 2161542 is about 129.2968346247.

The spelling of 2161542 in words is "two million, one hundred sixty-one thousand, five hundred forty-two".