1346921 has 4 divisors (see below), whose sum is σ = 1351812. Its totient is φ = 1342032.

The previous prime is 1346909. The next prime is 1346951. The reversal of 1346921 is 1296431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1296431 = 137 ⋅9463.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 648025 = 836^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1346921 - 2¹⁸ = 1084777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1346951) 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, 2006 + ... + 2591.

It is an arithmetic number, because the mean of its divisors is an integer number (337953).

2^1346921 is an apocalyptic number.

It is an amenable number.

1346921 is a deficient number, since it is larger than the sum of its proper divisors (4891).

1346921 is an equidigital number, since it uses as much as digits as its factorization.

1346921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its digits is 1296, while the sum is 26.

The square root of 1346921 is about 1160.5692568735. The cubic root of 1346921 is about 110.4368577925.

The spelling of 1346921 in words is "one million, three hundred forty-six thousand, nine hundred twenty-one".