810125061 has 4 divisors (see below), whose sum is σ = 1080166752. Its totient is φ = 540083372.

The previous prime is 810125039. The next prime is 810125083. The reversal of 810125061 is 160521018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (810125039) and next prime (810125083).

It is a cyclic number.

It is not a de Polignac number, because 810125061 - 2⁷ = 810124933 is a prime.

It is a super-2 number, since 2×810125061² = 1312605228920507442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810125161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135020841 + ... + 135020846.

It is an arithmetic number, because the mean of its divisors is an integer number (270041688).

Almost surely, 2^810125061 is an apocalyptic number.

It is an amenable number.

810125061 is a deficient number, since it is larger than the sum of its proper divisors (270041691).

810125061 is a wasteful number, since it uses less digits than its factorization.

810125061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270041690.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 810125061 is about 28462.6959545297. The cubic root of 810125061 is about 932.2177238364.

Adding to 810125061 its reverse (160521018), we get a palindrome (970646079).

The spelling of 810125061 in words is "eight hundred ten million, one hundred twenty-five thousand, sixty-one".