1351221 has 8 divisors (see below), whose sum is σ = 1808640. Its totient is φ = 897312.

The previous prime is 1351213. The next prime is 1351241. The reversal of 1351221 is 1221531.

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

It is not a de Polignac number, because 1351221 - 2³ = 1351213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1351221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351241) 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 7 ways as a sum of consecutive naturals, for example, 220 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (226080).

2^1351221 is an apocalyptic number.

It is an amenable number.

1351221 is a deficient number, since it is larger than the sum of its proper divisors (457419).

1351221 is a wasteful number, since it uses less digits than its factorization.

1351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 60, while the sum is 15.

The square root of 1351221 is about 1162.4203198499. The cubic root of 1351221 is about 110.5542549371.

Adding to 1351221 its reverse (1221531), we get a palindrome (2572752).

The spelling of 1351221 in words is "one million, three hundred fifty-one thousand, two hundred twenty-one".