2581942 has 8 divisors (see below), whose sum is σ = 4225032. Its totient is φ = 1173600.

The previous prime is 2581939. The next prime is 2581951. The reversal of 2581942 is 2491852.

2581942 is nontrivially palindromic in base 9.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58659 + ... + 58702.

It is an arithmetic number, because the mean of its divisors is an integer number (528129).

2^2581942 is an apocalyptic number.

2581942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2581942 is a deficient number, since it is larger than the sum of its proper divisors (1643090).

2581942 is a wasteful number, since it uses less digits than its factorization.

2581942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117374.

The product of its digits is 5760, while the sum is 31.

The square root of 2581942 is about 1606.8422449015. The cubic root of 2581942 is about 137.1878007666.

The spelling of 2581942 in words is "two million, five hundred eighty-one thousand, nine hundred forty-two".