2105542 has 16 divisors (see below), whose sum is σ = 3378240. Its totient is φ = 981288.

The previous prime is 2105513. The next prime is 2105549. The reversal of 2105542 is 2455012.

It is a super-2 number, since 2×2105542² = 8866614227528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (211140).

2^2105542 is an apocalyptic number.

2105542 is a deficient number, since it is larger than the sum of its proper divisors (1272698).

2105542 is a wasteful number, since it uses less digits than its factorization.

2105542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2105542 is about 1451.0485863678. The cubic root of 2105542 is about 128.1704678605.

The spelling of 2105542 in words is "two million, one hundred five thousand, five hundred forty-two".