1078981 has 2 divisors, whose sum is σ = 1078982. Its totient is φ = 1078980.

The previous prime is 1078967. The next prime is 1078993. The reversal of 1078981 is 1898701.

1078981 = 734² + 735².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 538756 = 735^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078981 - 2⁷ = 1078853 is a prime.

It is a super-2 number, since 2×1078981² = 2328399996722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539490 + 539491.

It is an arithmetic number, because the mean of its divisors is an integer number (539491).

2^1078981 is an apocalyptic number.

1078981 is the 735-th centered square number.

It is an amenable number.

1078981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078981 is an equidigital number, since it uses as much as digits as its factorization.

1078981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1078981 is about 1038.7401022392. The cubic root of 1078981 is about 102.5662787674.

The spelling of 1078981 in words is "one million, seventy-eight thousand, nine hundred eighty-one".