821474 has 16 divisors (see below), whose sum is σ = 1342008. Its totient is φ = 375552.

The previous prime is 821467. The next prime is 821477. The reversal of 821474 is 474128.

It can be written as a sum of positive squares in 4 ways, for example, as 801025 + 20449 = 895^2 + 143^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1584.

2⁸²¹⁴⁷⁴ is an apocalyptic number.

821474 is a deficient number, since it is larger than the sum of its proper divisors (520534).

821474 is a wasteful number, since it uses less digits than its factorization.

821474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709.

The product of its digits is 1792, while the sum is 26.

The square root of 821474 is about 906.3520287394. The cubic root of 821474 is about 93.6550659735.

The spelling of 821474 in words is "eight hundred twenty-one thousand, four hundred seventy-four".