2478091 has 8 divisors (see below), whose sum is σ = 3089664. Its totient is φ = 1930920.

The previous prime is 2478083. The next prime is 2478097. The reversal of 2478091 is 1908742.

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 2478091 - 2³ = 2478083 is a prime.

It is a super-2 number, since 2×2478091² = 12281870008562, which contains 22 as substring.

It is a Duffinian number.

2478091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478097) 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, 16015 + ... + 16168.

It is an arithmetic number, because the mean of its divisors is an integer number (386208).

2^2478091 is an apocalyptic number.

2478091 is a deficient number, since it is larger than the sum of its proper divisors (611573).

2478091 is a wasteful number, since it uses less digits than its factorization.

2478091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32201.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2478091 is about 1574.1953500122. The cubic root of 2478091 is about 135.3232491590.

It can be divided in two parts, 247 and 8091, that added together give a palindrome (8338).

The spelling of 2478091 in words is "two million, four hundred seventy-eight thousand, ninety-one".