2164961 has 8 divisors (see below), whose sum is σ = 2244864. Its totient is φ = 2086560.

The previous prime is 2164927. The next prime is 2164963. The reversal of 2164961 is 1694612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164961 is a prime.

It is a super-2 number, since 2×2164961² = 9374112263042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164963) 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 7 ways as a sum of consecutive naturals, for example, 3116 + ... + 3746.

It is an arithmetic number, because the mean of its divisors is an integer number (280608).

2^2164961 is an apocalyptic number.

It is an amenable number.

2164961 is a deficient number, since it is larger than the sum of its proper divisors (79903).

2164961 is an equidigital number, since it uses as much as digits as its factorization.

2164961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751.

The product of its digits is 2592, while the sum is 29.

The square root of 2164961 is about 1471.3806441570. The cubic root of 2164961 is about 129.3649700891.

It can be divided in two parts, 2164 and 961, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2164961 in words is "two million, one hundred sixty-four thousand, nine hundred sixty-one".