825125491 has 4 divisors (see below), whose sum is σ = 825394000. Its totient is φ = 824856984.

The previous prime is 825125479. The next prime is 825125513. The reversal of 825125491 is 194521528.

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 825125491 - 2⁷ = 825125363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 825125491.

It is not an unprimeable number, because it can be changed into a prime (825125461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129591 + ... + 135808.

It is an arithmetic number, because the mean of its divisors is an integer number (206348500).

Almost surely, 2^825125491 is an apocalyptic number.

825125491 is a deficient number, since it is larger than the sum of its proper divisors (268509).

825125491 is a wasteful number, since it uses less digits than its factorization.

825125491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268508.

The product of its digits is 28800, while the sum is 37.

The square root of 825125491 is about 28724.9976675369. The cubic root of 825125491 is about 937.9362794520.

The spelling of 825125491 in words is "eight hundred twenty-five million, one hundred twenty-five thousand, four hundred ninety-one".