1346053021 has 4 divisors (see below), whose sum is σ = 1346546844. Its totient is φ = 1345559200.

The previous prime is 1346052997. The next prime is 1346053039. The reversal of 1346053021 is 1203506431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203506431 = 13523 ⋅88997.

It can be written as a sum of positive squares in 2 ways, for example, as 115025625 + 1231027396 = 10725^2 + 35086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1346053021 - 2²¹ = 1343955869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1346063021) 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, 242800 + ... + 248281.

It is an arithmetic number, because the mean of its divisors is an integer number (336636711).

Almost surely, 2^1346053021 is an apocalyptic number.

It is an amenable number.

1346053021 is a deficient number, since it is larger than the sum of its proper divisors (493823).

1346053021 is an equidigital number, since it uses as much as digits as its factorization.

1346053021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493822.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1346053021 is about 36688.5952442990. The cubic root of 1346053021 is about 1104.1313022633.

Adding to 1346053021 its reverse (1203506431), we get a palindrome (2549559452).

The spelling of 1346053021 in words is "one billion, three hundred forty-six million, fifty-three thousand, twenty-one".