1298981 has 2 divisors, whose sum is σ = 1298982. Its totient is φ = 1298980.

The previous prime is 1298963. The next prime is 1298989. The reversal of 1298981 is 1898921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018081 + 280900 = 1009^2 + 530^2 .

It is an emirp because it is prime and its reverse (1898921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1298981 - 2¹⁴ = 1282597 is a prime.

It is a super-2 number, since 2×1298981² = 3374703276722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

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

It is a Curzon number.

It is equal to p₉₉₉₄₇ and since 1298981 and 99947 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298989) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649490 + 649491.

It is an arithmetic number, because the mean of its divisors is an integer number (649491).

2^1298981 is an apocalyptic number.

It is an amenable number.

1298981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298981 is an equidigital number, since it uses as much as digits as its factorization.

1298981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 1298981 is about 1139.7284764364. The cubic root of 1298981 is about 109.1107647150.

The spelling of 1298981 in words is "one million, two hundred ninety-eight thousand, nine hundred eighty-one".