1361221 has 4 divisors (see below), whose sum is σ = 1371744. Its totient is φ = 1350700.

The previous prime is 1361197. The next prime is 1361273. The reversal of 1361221 is 1221631.

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 not a de Polignac number, because 1361221 - 2¹¹ = 1359173 is a prime.

It is a super-2 number, since 2×1361221² = 3705845221682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1361195 and 1361204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5065 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (342936).

2^1361221 is an apocalyptic number.

It is an amenable number.

1361221 is a deficient number, since it is larger than the sum of its proper divisors (10523).

1361221 is a wasteful number, since it uses less digits than its factorization.

1361221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10522.

The product of its digits is 72, while the sum is 16.

The square root of 1361221 is about 1166.7137609542. The cubic root of 1361221 is about 110.8263117014.

Adding to 1361221 its reverse (1221631), we get a palindrome (2582852).

The spelling of 1361221 in words is "one million, three hundred sixty-one thousand, two hundred twenty-one".