71121603 has 32 divisors (see below), whose sum is σ = 110702592. Its totient is φ = 39780000.

The previous prime is 71121581. The next prime is 71121629. The reversal of 71121603 is 30612117.

It is not a de Polignac number, because 71121603 - 2⁵ = 71121571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 71121603.

It is not an unprimeable number, because it can be changed into a prime (71121643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283228 + ... + 283478.

It is an arithmetic number, because the mean of its divisors is an integer number (3459456).

Almost surely, 2^71121603 is an apocalyptic number.

71121603 is a deficient number, since it is larger than the sum of its proper divisors (39580989).

71121603 is a wasteful number, since it uses less digits than its factorization.

71121603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 71121603 is about 8433.3624966558. The cubic root of 71121603 is about 414.3180419199.

The spelling of 71121603 in words is "seventy-one million, one hundred twenty-one thousand, six hundred three".