6401042825 has 12 divisors (see below), whose sum is σ = 7978424988. Its totient is φ = 5094297600.

The previous prime is 6401042821. The next prime is 6401042839. The reversal of 6401042825 is 5282401046.

It can be written as a sum of positive squares in 6 ways, for example, as 19749136 + 6381293689 = 4444^2 + 79883^2 .

It is not a de Polignac number, because 6401042825 - 2² = 6401042821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6401042791 and 6401042800.

It is not an unprimeable number, because it can be changed into a prime (6401042821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658496 + ... + 668145.

It is an arithmetic number, because the mean of its divisors is an integer number (664868749).

Almost surely, 2^6401042825 is an apocalyptic number.

It is an amenable number.

6401042825 is a deficient number, since it is larger than the sum of its proper divisors (1577382163).

6401042825 is a wasteful number, since it uses less digits than its factorization.

6401042825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326844 (or 1326839 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 6401042825 is about 80006.5173907726. The cubic root of 6401042825 is about 1856.7363689035.

The spelling of 6401042825 in words is "six billion, four hundred one million, forty-two thousand, eight hundred twenty-five".