1298661 has 32 divisors (see below), whose sum is σ = 2193408. Its totient is φ = 665280.

The previous prime is 1298653. The next prime is 1298699. The reversal of 1298661 is 1668921.

It is not a de Polignac number, because 1298661 - 2³ = 1298653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18256 + ... + 18326.

It is an arithmetic number, because the mean of its divisors is an integer number (68544).

2^1298661 is an apocalyptic number.

It is an amenable number.

1298661 is a deficient number, since it is larger than the sum of its proper divisors (894747).

1298661 is a wasteful number, since it uses less digits than its factorization.

1298661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161.

The product of its digits is 5184, while the sum is 33.

The square root of 1298661 is about 1139.5880834758. The cubic root of 1298661 is about 109.1018042780.

The spelling of 1298661 in words is "one million, two hundred ninety-eight thousand, six hundred sixty-one".