29861281 has 2 divisors, whose sum is σ = 29861282. Its totient is φ = 29861280.

The previous prime is 29861203. The next prime is 29861303. The reversal of 29861281 is 18216892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 6677056 = 4815^2 + 2584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29861281 is a prime.

It is a super-2 number, since 2×29861281² = 1783392205921922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29861281.

It is not a weakly prime, because it can be changed into another prime (29867281) 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 as a sum of consecutive naturals, namely, 14930640 + 14930641.

It is an arithmetic number, because the mean of its divisors is an integer number (14930641).

Almost surely, 2^29861281 is an apocalyptic number.

It is an amenable number.

29861281 is a deficient number, since it is larger than the sum of its proper divisors (1).

29861281 is an equidigital number, since it uses as much as digits as its factorization.

29861281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 29861281 is about 5464.5476482505. The cubic root of 29861281 is about 310.2435858649.

The spelling of 29861281 in words is "twenty-nine million, eight hundred sixty-one thousand, two hundred eighty-one".