2190001 has 8 divisors (see below), whose sum is σ = 2401344. Its totient is φ = 1980720.

The previous prime is 2189989. The next prime is 2190017. The reversal of 2190001 is 1000912.

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

It is a cyclic number.

It is not a de Polignac number, because 2190001 - 2¹¹ = 2187953 is a prime.

It is a super-2 number, since 2×2190001² = 9592208760002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2190031) 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, 2515 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (300168).

2^2190001 is an apocalyptic number.

It is an amenable number.

2190001 is a deficient number, since it is larger than the sum of its proper divisors (211343).

2190001 is a wasteful number, since it uses less digits than its factorization.

2190001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2190001 is about 1479.8651965635. The cubic root of 2190001 is about 129.8618058099.

Adding to 2190001 its reverse (1000912), we get a palindrome (3190913).

The spelling of 2190001 in words is "two million, one hundred ninety thousand, one".