816140125 has 8 divisors (see below), whose sum is σ = 1018543032. Its totient is φ = 652912000.

The previous prime is 816140113. The next prime is 816140141. The reversal of 816140125 is 521041618.

It can be written as a sum of positive squares in 4 ways, for example, as 165431044 + 650709081 = 12862^2 + 25509^2 .

It is not a de Polignac number, because 816140125 - 2⁵ = 816140093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816140093 and 816140102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264436 + ... + 3264685.

It is an arithmetic number, because the mean of its divisors is an integer number (127317879).

Almost surely, 2^816140125 is an apocalyptic number.

It is an amenable number.

816140125 is a deficient number, since it is larger than the sum of its proper divisors (202402907).

816140125 is an equidigital number, since it uses as much as digits as its factorization.

816140125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529136 (or 6529126 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 816140125 is about 28568.1662869705. The cubic root of 816140125 is about 934.5192319938.

The spelling of 816140125 in words is "eight hundred sixteen million, one hundred forty thousand, one hundred twenty-five".