812043125 has 10 divisors (see below), whose sum is σ = 1014729870. Its totient is φ = 649634000.

The previous prime is 812043103. The next prime is 812043139. The reversal of 812043125 is 521340218.

It can be written as a sum of positive squares in 5 ways, for example, as 90744676 + 721298449 = 9526^2 + 26857^2 .

It is not a de Polignac number, because 812043125 - 2¹² = 812039029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812043094 and 812043103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 649010 + ... + 650259.

It is an arithmetic number, because the mean of its divisors is an integer number (101472987).

Almost surely, 2^812043125 is an apocalyptic number.

It is an amenable number.

812043125 is a deficient number, since it is larger than the sum of its proper divisors (202686745).

812043125 is an equidigital number, since it uses as much as digits as its factorization.

812043125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299289 (or 1299274 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 812043125 is about 28496.3703829102. The cubic root of 812043125 is about 932.9528547666.

The spelling of 812043125 in words is "eight hundred twelve million, forty-three thousand, one hundred twenty-five".