71025669 has 72 divisors (see below), whose sum is σ = 126355320. Its totient is φ = 38142720.

The previous prime is 71025613. The next prime is 71025683. The reversal of 71025669 is 96652017.

It can be written as a sum of positive squares in 4 ways, for example, as 13417569 + 57608100 = 3663^2 + 7590^2 .

It is not a de Polignac number, because 71025669 - 2¹¹ = 71023621 is a prime.

It is a super-2 number, since 2×71025669² = 10089291313795122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71025169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 410467 + ... + 410639.

It is an arithmetic number, because the mean of its divisors is an integer number (1754935).

Almost surely, 2^71025669 is an apocalyptic number.

It is an amenable number.

71025669 is a deficient number, since it is larger than the sum of its proper divisors (55329651).

71025669 is a wasteful number, since it uses less digits than its factorization.

71025669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 71025669 is about 8427.6728104501. The cubic root of 71025669 is about 414.1316706437.

The spelling of 71025669 in words is "seventy-one million, twenty-five thousand, six hundred sixty-nine".