1321413 has 4 divisors (see below), whose sum is σ = 1761888. Its totient is φ = 880940.

The previous prime is 1321409. The next prime is 1321417. The reversal of 1321413 is 3141231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3141231 = 3 ⋅1047077.

It is an interprime number because it is at equal distance from previous prime (1321409) and next prime (1321417).

It is a cyclic number.

It is not a de Polignac number, because 1321413 - 2² = 1321409 is a prime.

It is a super-2 number, since 2×1321413² = 3492264633138, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1321392 and 1321401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321417) 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, 220233 + ... + 220238.

It is an arithmetic number, because the mean of its divisors is an integer number (440472).

2^1321413 is an apocalyptic number.

It is an amenable number.

1321413 is a deficient number, since it is larger than the sum of its proper divisors (440475).

1321413 is an equidigital number, since it uses as much as digits as its factorization.

1321413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440474.

The product of its digits is 72, while the sum is 15.

The square root of 1321413 is about 1149.5272941518. The cubic root of 1321413 is about 109.7352586646.

Adding to 1321413 its reverse (3141231), we get a palindrome (4462644).

The spelling of 1321413 in words is "one million, three hundred twenty-one thousand, four hundred thirteen".