71540235 has 72 divisors (see below), whose sum is σ = 140456160. Its totient is φ = 33606144.

The previous prime is 71540221. The next prime is 71540237. The reversal of 71540235 is 53204517.

It is a happy number.

It is not a de Polignac number, because 71540235 - 2¹² = 71536139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71540199 and 71540208.

It is not an unprimeable number, because it can be changed into a prime (71540237) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 174711 + ... + 175119.

It is an arithmetic number, because the mean of its divisors is an integer number (1950780).

Almost surely, 2^71540235 is an apocalyptic number.

71540235 is a deficient number, since it is larger than the sum of its proper divisors (68915925).

71540235 is a wasteful number, since it uses less digits than its factorization.

71540235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 71540235 is about 8458.1460734608. The cubic root of 71540235 is about 415.1293640348.

The spelling of 71540235 in words is "seventy-one million, five hundred forty thousand, two hundred thirty-five".