71241945 has 8 divisors (see below), whose sum is σ = 113987136. Its totient is φ = 37995696.

The previous prime is 71241913. The next prime is 71241953. The reversal of 71241945 is 54914217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71241945 - 2⁵ = 71241913 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2374717 + ... + 2374746.

It is an arithmetic number, because the mean of its divisors is an integer number (14248392).

Almost surely, 2^71241945 is an apocalyptic number.

It is an amenable number.

71241945 is a deficient number, since it is larger than the sum of its proper divisors (42745191).

71241945 is a wasteful number, since it uses less digits than its factorization.

71241945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749471.

The product of its digits is 10080, while the sum is 33.

The square root of 71241945 is about 8440.4943575599. The cubic root of 71241945 is about 414.5515938654.

The spelling of 71241945 in words is "seventy-one million, two hundred forty-one thousand, nine hundred forty-five".