2149491 has 8 divisors (see below), whose sum is σ = 2875600. Its totient is φ = 1428192.

The previous prime is 2149471. The next prime is 2149493. The reversal of 2149491 is 1949412.

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

It is not a de Polignac number, because 2149491 - 2¹⁰ = 2148467 is a prime.

It is a super-3 number, since 3×2149491³ = 29793954340321733313, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149493) 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, 21 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (359450).

2^2149491 is an apocalyptic number.

2149491 is a deficient number, since it is larger than the sum of its proper divisors (726109).

2149491 is a wasteful number, since it uses less digits than its factorization.

2149491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405.

The product of its digits is 2592, while the sum is 30.

The square root of 2149491 is about 1466.1142520281. The cubic root of 2149491 is about 129.0561020324.

The spelling of 2149491 in words is "two million, one hundred forty-nine thousand, four hundred ninety-one".