1221353 has 8 divisors (see below), whose sum is σ = 1406400. Its totient is φ = 1038960.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221353 is 3531221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221353 - 2⁶ = 1221289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (175800).

2^1221353 is an apocalyptic number.

It is an amenable number.

1221353 is a deficient number, since it is larger than the sum of its proper divisors (185047).

1221353 is a wasteful number, since it uses less digits than its factorization.

1221353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its digits is 180, while the sum is 17.

The square root of 1221353 is about 1105.1484063238. The cubic root of 1221353 is about 106.8924589879.

Adding to 1221353 its reverse (3531221), we get a palindrome (4752574).

The spelling of 1221353 in words is "one million, two hundred twenty-one thousand, three hundred fifty-three".