71540122 has 4 divisors (see below), whose sum is σ = 107310186. Its totient is φ = 35770060.

The previous prime is 71540099. The next prime is 71540123. The reversal of 71540122 is 22104517.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 59768361 + 11771761 = 7731^2 + 3431^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71540093 and 71540102.

It is not an unprimeable number, because it can be changed into a prime (71540123) by changing a digit.

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 as a sum of consecutive naturals, namely, 17885029 + ... + 17885032.

Almost surely, 2^71540122 is an apocalyptic number.

71540122 is a deficient number, since it is larger than the sum of its proper divisors (35770064).

71540122 is a wasteful number, since it uses less digits than its factorization.

71540122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35770063.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 71540122 is about 8458.1393935073. The cubic root of 71540122 is about 415.1291454648.

Adding to 71540122 its reverse (22104517), we get a palindrome (93644639).

The spelling of 71540122 in words is "seventy-one million, five hundred forty thousand, one hundred twenty-two".