821341125 has 96 divisors (see below), whose sum is σ = 1668086784. Its totient is φ = 385200000.

The previous prime is 821341123. The next prime is 821341127. The reversal of 821341125 is 521143128.

It is an interprime number because it is at equal distance from previous prime (821341123) and next prime (821341127).

It is not a de Polignac number, because 821341125 - 2¹ = 821341123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821341123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 382555 + ... + 384695.

It is an arithmetic number, because the mean of its divisors is an integer number (17375904).

Almost surely, 2^821341125 is an apocalyptic number.

It is an amenable number.

821341125 is an abundant number, since it is smaller than the sum of its proper divisors (846745659).

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

821341125 is a wasteful number, since it uses less digits than its factorization.

821341125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2191 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 821341125 is about 28659.0496178781. The cubic root of 821341125 is about 936.5001607219.

The spelling of 821341125 in words is "eight hundred twenty-one million, three hundred forty-one thousand, one hundred twenty-five".