1029881 has 2 divisors, whose sum is σ = 1029882. Its totient is φ = 1029880.

The previous prime is 1029859. The next prime is 1029883. The reversal of 1029881 is 1889201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 144400 = 941^2 + 380^2 .

It is an emirp because it is prime and its reverse (1889201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1029881 is a prime.

It is a super-2 number, since 2×1029881² = 2121309748322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1029883, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1029883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514940 + 514941.

It is an arithmetic number, because the mean of its divisors is an integer number (514941).

2^1029881 is an apocalyptic number.

It is an amenable number.

1029881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1029881 is an equidigital number, since it uses as much as digits as its factorization.

1029881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1029881 is about 1014.8305277237. The cubic root of 1029881 is about 100.9862739900.

The spelling of 1029881 in words is "one million, twenty-nine thousand, eight hundred eighty-one".