821348 has 18 divisors (see below), whose sum is σ = 1580838. Its totient is φ = 373120.

The previous prime is 821333. The next prime is 821377. The reversal of 821348 is 843128.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 7744 = 902^2 + 88^2 .

It is a super-2 number, since 2×821348² = 1349225074208, which contains 22 as substring.

It is a plaindrome in base 15.

It is a nialpdrome in base 11 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 821348.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 365 + ... + 1332.

2⁸²¹³⁴⁸ is an apocalyptic number.

It is an amenable number.

821348 is a deficient number, since it is larger than the sum of its proper divisors (759490).

821348 is a wasteful number, since it uses less digits than its factorization.

821348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1710 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 821348 is about 906.2825166580. The cubic root of 821348 is about 93.6502773693.

The spelling of 821348 in words is "eight hundred twenty-one thousand, three hundred forty-eight".