2581433 has 4 divisors (see below), whose sum is σ = 2733300. Its totient is φ = 2429568.

The previous prime is 2581429. The next prime is 2581441. The reversal of 2581433 is 3341852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 976144 + 1605289 = 988^2 + 1267^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581433 - 2² = 2581429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581133) 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 3 ways as a sum of consecutive naturals, for example, 75908 + ... + 75941.

It is an arithmetic number, because the mean of its divisors is an integer number (683325).

2^2581433 is an apocalyptic number.

It is an amenable number.

2581433 is a deficient number, since it is larger than the sum of its proper divisors (151867).

2581433 is a wasteful number, since it uses less digits than its factorization.

2581433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151866.

The product of its digits is 2880, while the sum is 26.

The square root of 2581433 is about 1606.6838519136. The cubic root of 2581433 is about 137.1787851781.

The spelling of 2581433 in words is "two million, five hundred eighty-one thousand, four hundred thirty-three".