845125051 has 4 divisors (see below), whose sum is σ = 849846600. Its totient is φ = 840403504.

The previous prime is 845125037. The next prime is 845125081. The reversal of 845125051 is 150521548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 845125051 - 2¹⁷ = 844993979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845125081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360506 + ... + 2360863.

It is an arithmetic number, because the mean of its divisors is an integer number (212461650).

Almost surely, 2^845125051 is an apocalyptic number.

845125051 is a deficient number, since it is larger than the sum of its proper divisors (4721549).

845125051 is a wasteful number, since it uses less digits than its factorization.

845125051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721548.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 845125051 is about 29071.0345705137. The cubic root of 845125051 is about 945.4538290297.

Adding to 845125051 its reverse (150521548), we get a palindrome (995646599).

The spelling of 845125051 in words is "eight hundred forty-five million, one hundred twenty-five thousand, fifty-one".