1298581 has 2 divisors, whose sum is σ = 1298582. Its totient is φ = 1298580.

The previous prime is 1298573. The next prime is 1298611. The reversal of 1298581 is 1858921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 576081 = 850^2 + 759^2 .

It is an emirp because it is prime and its reverse (1858921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1298581 - 2³ = 1298573 is a prime.

It is a super-2 number, since 2×1298581² = 3372625227122, which contains 22 as substring.

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

1298581 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649290 + 649291.

It is an arithmetic number, because the mean of its divisors is an integer number (649291).

2^1298581 is an apocalyptic number.

It is an amenable number.

1298581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298581 is an equidigital number, since it uses as much as digits as its factorization.

1298581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 34.

The square root of 1298581 is about 1139.5529825331. The cubic root of 1298581 is about 109.0995639388.

The spelling of 1298581 in words is "one million, two hundred ninety-eight thousand, five hundred eighty-one".