2101869 has 40 divisors (see below), whose sum is σ = 3926208. Its totient is φ = 1088640.

The previous prime is 2101867. The next prime is 2101871. The reversal of 2101869 is 9681012.

It is an interprime number because it is at equal distance from previous prime (2101867) and next prime (2101871).

It is not a de Polignac number, because 2101869 - 2¹ = 2101867 is a prime.

It is a super-2 number, since 2×2101869² = 8835706586322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101867) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6069 + ... + 6405.

2^2101869 is an apocalyptic number.

It is an amenable number.

2101869 is a deficient number, since it is larger than the sum of its proper divisors (1824339).

2101869 is a wasteful number, since it uses less digits than its factorization.

2101869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2101869 is about 1449.7823974652. The cubic root of 2101869 is about 128.0958957490.

The spelling of 2101869 in words is "two million, one hundred one thousand, eight hundred sixty-nine".