71440541 has 4 divisors (see below), whose sum is σ = 71499900. Its totient is φ = 71381184.

The previous prime is 71440529. The next prime is 71440549. The reversal of 71440541 is 14504417.

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 69789316 + 1651225 = 8354^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 71440541 - 2¹⁰ = 71439517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71440541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27836 + ... + 30293.

It is an arithmetic number, because the mean of its divisors is an integer number (17874975).

Almost surely, 2^71440541 is an apocalyptic number.

It is an amenable number.

71440541 is a deficient number, since it is larger than the sum of its proper divisors (59359).

71440541 is a wasteful number, since it uses less digits than its factorization.

71440541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59358.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 71440541 is about 8452.2506470170. The cubic root of 71440541 is about 414.9364416139.

Adding to 71440541 its reverse (14504417), we get a palindrome (85944958).

The spelling of 71440541 in words is "seventy-one million, four hundred forty thousand, five hundred forty-one".