1321550 has 12 divisors (see below), whose sum is σ = 2458176. Its totient is φ = 528600.

The previous prime is 1321549. The next prime is 1321571. The reversal of 1321550 is 551231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13166 + ... + 13265.

It is an arithmetic number, because the mean of its divisors is an integer number (204848).

2^1321550 is an apocalyptic number.

1321550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321550 is a deficient number, since it is larger than the sum of its proper divisors (1136626).

1321550 is a wasteful number, since it uses less digits than its factorization.

1321550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26443 (or 26438 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1321550 is about 1149.5868823190. The cubic root of 1321550 is about 109.7390508706.

Adding to 1321550 its reverse (551231), we get a palindrome (1872781).

The spelling of 1321550 in words is "one million, three hundred twenty-one thousand, five hundred fifty".