2921091 has 8 divisors (see below), whose sum is σ = 3930960. Its totient is φ = 1929312.

The previous prime is 2921089. The next prime is 2921111. The reversal of 2921091 is 1901292.

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

It is not a de Polignac number, because 2921091 - 2¹ = 2921089 is a prime.

2921091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2921591) 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, 4140 + ... + 4793.

It is an arithmetic number, because the mean of its divisors is an integer number (491370).

2^2921091 is an apocalyptic number.

2921091 is a deficient number, since it is larger than the sum of its proper divisors (1009869).

2921091 is a wasteful number, since it uses less digits than its factorization.

2921091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2921091 is about 1709.1199489796. The cubic root of 2921091 is about 142.9491889180.

The spelling of 2921091 in words is "two million, nine hundred twenty-one thousand, ninety-one".