825481001 has 4 divisors (see below), whose sum is σ = 825559812. Its totient is φ = 825402192.

The previous prime is 825480991. The next prime is 825481031. The reversal of 825481001 is 100184528.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 433638976 + 391842025 = 20824^2 + 19795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825481001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825481031) 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, 20750 + ... + 45623.

It is an arithmetic number, because the mean of its divisors is an integer number (206389953).

Almost surely, 2^825481001 is an apocalyptic number.

It is an amenable number.

825481001 is a deficient number, since it is larger than the sum of its proper divisors (78811).

825481001 is a wasteful number, since it uses less digits than its factorization.

825481001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78810.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 825481001 is about 28731.1851652521. The cubic root of 825481001 is about 938.0709651666.

The spelling of 825481001 in words is "eight hundred twenty-five million, four hundred eighty-one thousand, one".