2561926 has 16 divisors (see below), whose sum is σ = 3981600. Its totient is φ = 1235520.

The previous prime is 2561921. The next prime is 2561927. The reversal of 2561926 is 6291652.

2561926 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2561926³ = 50445333590160392328, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561921) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12775 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (248850).

2^2561926 is an apocalyptic number.

2561926 is a deficient number, since it is larger than the sum of its proper divisors (1419674).

2561926 is a wasteful number, since it uses less digits than its factorization.

2561926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399.

The product of its digits is 6480, while the sum is 31.

The square root of 2561926 is about 1600.6017618383. The cubic root of 2561926 is about 136.8323735268.

The spelling of 2561926 in words is "two million, five hundred sixty-one thousand, nine hundred twenty-six".