70825081 has 4 divisors (see below), whose sum is σ = 72552564. Its totient is φ = 69097600.

The previous prime is 70825061. The next prime is 70825121. The reversal of 70825081 is 18052807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18052807 = 53 ⋅340619.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 56385081 = 3800^2 + 7509^2 .

It is a cyclic number.

It is not a de Polignac number, because 70825081 - 2⁷ = 70824953 is a prime.

It is a super-2 number, since 2×70825081² = 10032384197313122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70825031) 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 3 ways as a sum of consecutive naturals, for example, 863680 + ... + 863761.

It is an arithmetic number, because the mean of its divisors is an integer number (18138141).

Almost surely, 2^70825081 is an apocalyptic number.

It is an amenable number.

70825081 is a deficient number, since it is larger than the sum of its proper divisors (1727483).

70825081 is a wasteful number, since it uses less digits than its factorization.

70825081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727482.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 70825081 is about 8415.7638393672. The cubic root of 70825081 is about 413.7414447412.

Adding to 70825081 its reverse (18052807), we get a palindrome (88877888).

The spelling of 70825081 in words is "seventy million, eight hundred twenty-five thousand, eighty-one".