71450945 has 4 divisors (see below), whose sum is σ = 85741140. Its totient is φ = 57160752.

The previous prime is 71450927. The next prime is 71450969. The reversal of 71450945 is 54905417.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26708224 + 44742721 = 5168^2 + 6689^2 .

It is a cyclic number.

It is not a de Polignac number, because 71450945 - 2⁸ = 71450689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7145090 + ... + 7145099.

It is an arithmetic number, because the mean of its divisors is an integer number (21435285).

Almost surely, 2^71450945 is an apocalyptic number.

It is an amenable number.

71450945 is a deficient number, since it is larger than the sum of its proper divisors (14290195).

71450945 is a wasteful number, since it uses less digits than its factorization.

71450945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14290194.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 71450945 is about 8452.8660819866. The cubic root of 71450945 is about 414.9565832549.

The spelling of 71450945 in words is "seventy-one million, four hundred fifty thousand, nine hundred forty-five".