825641434 has 4 divisors (see below), whose sum is σ = 1238462154. Its totient is φ = 412820716.

The previous prime is 825641429. The next prime is 825641437. The reversal of 825641434 is 434146528.

825641434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 726140809 + 99500625 = 26947^2 + 9975^2 .

It is a junction number, because it is equal to n+sod(n) for n = 825641393 and 825641402.

It is not an unprimeable number, because it can be changed into a prime (825641437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206410357 + ... + 206410360.

Almost surely, 2^825641434 is an apocalyptic number.

825641434 is a deficient number, since it is larger than the sum of its proper divisors (412820720).

825641434 is a wasteful number, since it uses less digits than its factorization.

825641434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412820719.

The product of its digits is 92160, while the sum is 37.

The square root of 825641434 is about 28733.9769958842. The cubic root of 825641434 is about 938.1317328848.

The spelling of 825641434 in words is "eight hundred twenty-five million, six hundred forty-one thousand, four hundred thirty-four".