1310221 has 8 divisors (see below), whose sum is σ = 1504800. Its totient is φ = 1128240.

The previous prime is 1310209. The next prime is 1310233. The reversal of 1310221 is 1220131.

It is an interprime number because it is at equal distance from previous prime (1310209) and next prime (1310233).

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 1310221 - 2⁵ = 1310189 is a prime.

1310221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1310198 and 1310207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2926 + ... + 3343.

It is an arithmetic number, because the mean of its divisors is an integer number (188100).

2^1310221 is an apocalyptic number.

1310221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1310221 is a deficient number, since it is larger than the sum of its proper divisors (194579).

1310221 is a wasteful number, since it uses less digits than its factorization.

1310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1310221 is about 1144.6488544528. The cubic root of 1310221 is about 109.4245708363.

Adding to 1310221 its reverse (1220131), we get a palindrome (2530352).

The spelling of 1310221 in words is "one million, three hundred ten thousand, two hundred twenty-one".