1221201 has 12 divisors (see below), whose sum is σ = 1802112. Its totient is φ = 796536.

The previous prime is 1221197. The next prime is 1221221. The reversal of 1221201 is 1021221.

It is not a de Polignac number, because 1221201 - 2² = 1221197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1021 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (150176).

2^1221201 is an apocalyptic number.

It is an amenable number.

1221201 is a deficient number, since it is larger than the sum of its proper divisors (580911).

1221201 is a wasteful number, since it uses less digits than its factorization.

1221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2937 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1221201 is about 1105.0796351395. The cubic root of 1221201 is about 106.8880244720. Note that the first 3 decimals are identical.

Adding to 1221201 its reverse (1021221), we get a palindrome (2242422).

The spelling of 1221201 in words is "one million, two hundred twenty-one thousand, two hundred one".