2561478 has 8 divisors (see below), whose sum is σ = 5122968. Its totient is φ = 853824.

The previous prime is 2561431. The next prime is 2561491. The reversal of 2561478 is 8741652.

2561478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

2561478 is an admirable number.

It is a super-2 number, since 2×2561478² = 13122339088968, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213451 + ... + 213462.

It is an arithmetic number, because the mean of its divisors is an integer number (640371).

2^2561478 is an apocalyptic number.

2561478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561478 is a wasteful number, since it uses less digits than its factorization.

2561478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426918.

The product of its digits is 13440, while the sum is 33.

The square root of 2561478 is about 1600.4618083541. The cubic root of 2561478 is about 136.8243971740.

The spelling of 2561478 in words is "two million, five hundred sixty-one thousand, four hundred seventy-eight".