2478749 has 8 divisors (see below), whose sum is σ = 3050880. Its totient is φ = 1961136.

The previous prime is 2478743. The next prime is 2478761. The reversal of 2478749 is 9478742.

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-2478749 is a prime.

It is a super-2 number, since 2×2478749² = 12288393210002, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2 + 4⁵ + 7² + 8⁷ + 7⁶ + 4⁹ + 9³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478743) 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, 13529 + ... + 13710.

It is an arithmetic number, because the mean of its divisors is an integer number (381360).

2^2478749 is an apocalyptic number.

It is an amenable number.

2478749 is a deficient number, since it is larger than the sum of its proper divisors (572131).

2478749 is a wasteful number, since it uses less digits than its factorization.

2478749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27259.

The product of its digits is 112896, while the sum is 41.

The square root of 2478749 is about 1574.4043318030. The cubic root of 2478749 is about 135.3352254232.

The spelling of 2478749 in words is "two million, four hundred seventy-eight thousand, seven hundred forty-nine".