2529281 has 4 divisors (see below), whose sum is σ = 2538564. Its totient is φ = 2520000.

The previous prime is 2529269. The next prime is 2529301. The reversal of 2529281 is 1829252.

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 1050625 + 1478656 = 1025^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 2529281 - 2¹⁴ = 2512897 is a prime.

It is a super-2 number, since 2×2529281² = 12794524753922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2529251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220 + ... + 4781.

It is an arithmetic number, because the mean of its divisors is an integer number (634641).

It is a Proth number, since it is equal to 1235 ⋅ 2¹¹ + 1 and 1235 < 2¹¹.

2^2529281 is an apocalyptic number.

It is an amenable number.

2529281 is a deficient number, since it is larger than the sum of its proper divisors (9283).

2529281 is an equidigital number, since it uses as much as digits as its factorization.

2529281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9282.

The product of its digits is 2880, while the sum is 29.

The square root of 2529281 is about 1590.3713402850. The cubic root of 2529281 is about 136.2486979086.

Subtracting from 2529281 its sum of digits (29), we obtain a palindrome (2529252).

It can be divided in two parts, 2529 and 281, that multiplied together give a square (710649 = 843²).

The spelling of 2529281 in words is "two million, five hundred twenty-nine thousand, two hundred eighty-one".