70820825 has 12 divisors (see below), whose sum is σ = 88080300. Its totient is φ = 56487360.

The previous prime is 70820821. The next prime is 70820831. The reversal of 70820825 is 52802807.

It can be written as a sum of positive squares in 6 ways, for example, as 3268864 + 67551961 = 1808^2 + 8219^2 .

It is not a de Polignac number, because 70820825 - 2² = 70820821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70820791 and 70820800.

It is not an unprimeable number, because it can be changed into a prime (70820821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4667 + ... + 12783.

It is an arithmetic number, because the mean of its divisors is an integer number (7340025).

Almost surely, 2^70820825 is an apocalyptic number.

It is an amenable number.

70820825 is a deficient number, since it is larger than the sum of its proper divisors (17259475).

70820825 is a wasteful number, since it uses less digits than its factorization.

70820825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8476 (or 8471 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 70820825 is about 8415.5109767619. The cubic root of 70820825 is about 413.7331570986.

The spelling of 70820825 in words is "seventy million, eight hundred twenty thousand, eight hundred twenty-five".