2101858 has 8 divisors (see below), whose sum is σ = 3439440. Its totient is φ = 955380.

The previous prime is 2101849. The next prime is 2101867. The reversal of 2101858 is 8581012.

It is an interprime number because it is at equal distance from previous prime (2101849) and next prime (2101867).

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47748 + ... + 47791.

It is an arithmetic number, because the mean of its divisors is an integer number (429930).

2^2101858 is an apocalyptic number.

2101858 is a deficient number, since it is larger than the sum of its proper divisors (1337582).

2101858 is a wasteful number, since it uses less digits than its factorization.

2101858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95552.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 2101858 is about 1449.7786037875. The cubic root of 2101858 is about 128.0956722880.

The spelling of 2101858 in words is "two million, one hundred one thousand, eight hundred fifty-eight".