1221341 has 4 divisors (see below), whose sum is σ = 1332384. Its totient is φ = 1110300.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221341 is 1431221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221391) 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 3 ways as a sum of consecutive naturals, for example, 55505 + ... + 55526.

It is an arithmetic number, because the mean of its divisors is an integer number (333096).

2^1221341 is an apocalyptic number.

1221341 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221341 is a deficient number, since it is larger than the sum of its proper divisors (111043).

1221341 is a wasteful number, since it uses less digits than its factorization.

1221341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111042.

The product of its digits is 48, while the sum is 14.

The square root of 1221341 is about 1105.1429771754. The cubic root of 1221341 is about 106.8921089079.

Adding to 1221341 its reverse (1431221), we get a palindrome (2652562).

The spelling of 1221341 in words is "one million, two hundred twenty-one thousand, three hundred forty-one".