821260 has 24 divisors (see below), whose sum is σ = 1881936. Its totient is φ = 298560.

The previous prime is 821209. The next prime is 821263. The reversal of 821260 is 62128.

821260 = T₆₃ + T₆₄ + ... + T₁₇₂.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (821263) by changing a digit.

821260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (78414).

2⁸²¹²⁶⁰ is an apocalyptic number.

It is an amenable number.

821260 is an abundant number, since it is smaller than the sum of its proper divisors (1060676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821260 is a wasteful number, since it uses less digits than its factorization.

821260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753 (or 3751 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 821260 is about 906.2339653754. The cubic root of 821260 is about 93.6469326568.

Adding to 821260 its reverse (62128), we get a palindrome (883388).

It can be divided in two parts, 821 and 260, that added together give a triangular number (1081 = T₄₆).

The spelling of 821260 in words is "eight hundred twenty-one thousand, two hundred sixty".