2103858 has 12 divisors (see below), whose sum is σ = 4558398. Its totient is φ = 701280.

The previous prime is 2103839. The next prime is 2103859. The reversal of 2103858 is 8583012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2082249 + 21609 = 1443^2 + 147^2 .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2103859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58423 + ... + 58458.

2^2103858 is an apocalyptic number.

2103858 is an abundant number, since it is smaller than the sum of its proper divisors (2454540).

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

2103858 is a wasteful number, since it uses less digits than its factorization.

2103858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116889 (or 116886 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2103858 is about 1450.4682002719. The cubic root of 2103858 is about 128.1362887535.

The spelling of 2103858 in words is "two million, one hundred three thousand, eight hundred fifty-eight".