1321089 has 48 divisors (see below), whose sum is σ = 2407680. Its totient is φ = 635040.

The previous prime is 1321079. The next prime is 1321093. The reversal of 1321089 is 9801231.

It is not a de Polignac number, because 1321089 - 2⁷ = 1320961 is a prime.

It is a super-2 number, since 2×1321089² = 3490552291842, which contains 22 as substring.

1321089 is a modest number, since divided by 1089 gives 132 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30702 + ... + 30744.

It is an arithmetic number, because the mean of its divisors is an integer number (50160).

2^1321089 is an apocalyptic number.

1321089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1321089 is a deficient number, since it is larger than the sum of its proper divisors (1086591).

1321089 is a wasteful number, since it uses less digits than its factorization.

1321089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1321089 is about 1149.3863580189. The cubic root of 1321089 is about 109.7262891927.

It can be divided in two parts, 132 and 1089, that added together give a palindrome (1221).

The spelling of 1321089 in words is "one million, three hundred twenty-one thousand, eighty-nine".