2538781 has 8 divisors (see below), whose sum is σ = 2932160. Its totient is φ = 2153088.

The previous prime is 2538779. The next prime is 2538787. The reversal of 2538781 is 1878352.

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

It is not a de Polignac number, because 2538781 - 2¹ = 2538779 is a prime.

It is a super-2 number, since 2×2538781² = 12890817931922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1191 + ... + 2548.

It is an arithmetic number, because the mean of its divisors is an integer number (366520).

2^2538781 is an apocalyptic number.

It is an amenable number.

2538781 is a deficient number, since it is larger than the sum of its proper divisors (393379).

2538781 is an equidigital number, since it uses as much as digits as its factorization.

2538781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843.

The product of its digits is 13440, while the sum is 34.

The square root of 2538781 is about 1593.3552648421. The cubic root of 2538781 is about 136.4190685209.

The spelling of 2538781 in words is "two million, five hundred thirty-eight thousand, seven hundred eighty-one".