2146991 has 8 divisors (see below), whose sum is σ = 2676864. Its totient is φ = 1672920.

The previous prime is 2146987. The next prime is 2146993. The reversal of 2146991 is 1996412.

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 2146991 - 2² = 2146987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146993) 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, 13865 + ... + 14018.

It is an arithmetic number, because the mean of its divisors is an integer number (334608).

2^2146991 is an apocalyptic number.

2146991 is a deficient number, since it is larger than the sum of its proper divisors (529873).

2146991 is a wasteful number, since it uses less digits than its factorization.

2146991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901.

The product of its digits is 3888, while the sum is 32.

The square root of 2146991 is about 1465.2614101245. The cubic root of 2146991 is about 129.0060490323.

The spelling of 2146991 in words is "two million, one hundred forty-six thousand, nine hundred ninety-one".