71159621 has 16 divisors (see below), whose sum is σ = 79161600. Its totient is φ = 63540288.

The previous prime is 71159587. The next prime is 71159629. The reversal of 71159621 is 12695117.

It is a cyclic number.

It is not a de Polignac number, because 71159621 - 2¹⁰ = 71158597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71159629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114650 + ... + 115268.

It is an arithmetic number, because the mean of its divisors is an integer number (4947600).

Almost surely, 2^71159621 is an apocalyptic number.

It is an amenable number.

71159621 is a deficient number, since it is larger than the sum of its proper divisors (8001979).

71159621 is a wasteful number, since it uses less digits than its factorization.

71159621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908.

The product of its digits is 3780, while the sum is 32.

The square root of 71159621 is about 8435.6162193405. The cubic root of 71159621 is about 414.3918532366.

The spelling of 71159621 in words is "seventy-one million, one hundred fifty-nine thousand, six hundred twenty-one".