825442417 has 4 divisors (see below), whose sum is σ = 826050276. Its totient is φ = 824834560.

The previous prime is 825442369. The next prime is 825442421. The reversal of 825442417 is 714244528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 427000896 + 398441521 = 20664^2 + 19961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825442417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825442447) 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, 301888 + ... + 304609.

It is an arithmetic number, because the mean of its divisors is an integer number (206512569).

Almost surely, 2^825442417 is an apocalyptic number.

It is an amenable number.

825442417 is a deficient number, since it is larger than the sum of its proper divisors (607859).

825442417 is a wasteful number, since it uses less digits than its factorization.

825442417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607858.

The product of its digits is 71680, while the sum is 37.

The square root of 825442417 is about 28730.5136918921. The cubic root of 825442417 is about 938.0563494076.

The spelling of 825442417 in words is "eight hundred twenty-five million, four hundred forty-two thousand, four hundred seventeen".