2478401 has 4 divisors (see below), whose sum is σ = 2481600. Its totient is φ = 2475204.

The previous prime is 2478373. The next prime is 2478403. The reversal of 2478401 is 1048742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2478401 - 2⁶ = 2478337 is a prime.

It is a super-3 number, since 3×2478401³ = 45670522649133345603, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2478403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (620400).

2^2478401 is an apocalyptic number.

It is an amenable number.

2478401 is a deficient number, since it is larger than the sum of its proper divisors (3199).

2478401 is a wasteful number, since it uses less digits than its factorization.

2478401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 2478401 is about 1574.2938099351. The cubic root of 2478401 is about 135.3288917360.

The spelling of 2478401 in words is "two million, four hundred seventy-eight thousand, four hundred one".