1347421 has 4 divisors (see below), whose sum is σ = 1352700. Its totient is φ = 1342144.

The previous prime is 1347413. The next prime is 1347433. The reversal of 1347421 is 1247431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1247431 = 383 ⋅3257.

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 1028196 = 565^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347421 - 2³ = 1347413 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1347392 and 1347401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1347481) 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, 2236 + ... + 2773.

It is an arithmetic number, because the mean of its divisors is an integer number (338175).

2^1347421 is an apocalyptic number.

It is an amenable number.

1347421 is a deficient number, since it is larger than the sum of its proper divisors (5279).

1347421 is an equidigital number, since it uses as much as digits as its factorization.

1347421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278.

The product of its digits is 672, while the sum is 22.

The square root of 1347421 is about 1160.7846484168. The cubic root of 1347421 is about 110.4505214490.

The spelling of 1347421 in words is "one million, three hundred forty-seven thousand, four hundred twenty-one".