2152481 has 2 divisors, whose sum is σ = 2152482. Its totient is φ = 2152480.

The previous prime is 2152477. The next prime is 2152483. The reversal of 2152481 is 1842512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 234256 = 1385^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152481 - 2² = 2152477 is a prime.

It is a super-2 number, since 2×2152481² = 9266348910722, which contains 22 as substring.

Together with 2152483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2152483) 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 as a sum of consecutive naturals, namely, 1076240 + 1076241.

It is an arithmetic number, because the mean of its divisors is an integer number (1076241).

2^2152481 is an apocalyptic number.

It is an amenable number.

2152481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152481 is an equidigital number, since it uses as much as digits as its factorization.

2152481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 23.

The square root of 2152481 is about 1467.1335999152. The cubic root of 2152481 is about 129.1159144812.

Adding to 2152481 its reverse (1842512), we get a palindrome (3994993).

The spelling of 2152481 in words is "two million, one hundred fifty-two thousand, four hundred eighty-one".