71265421 has 8 divisors (see below), whose sum is σ = 74096064. Its totient is φ = 68486880.

The previous prime is 71265401. The next prime is 71265427. The reversal of 71265421 is 12456217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71265421 - 2⁹ = 71264909 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 71265421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71265427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10225 + ... + 15718.

It is an arithmetic number, because the mean of its divisors is an integer number (9262008).

Almost surely, 2^71265421 is an apocalyptic number.

It is an amenable number.

71265421 is a deficient number, since it is larger than the sum of its proper divisors (2830643).

71265421 is a wasteful number, since it uses less digits than its factorization.

71265421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26051.

The product of its digits is 3360, while the sum is 28.

The square root of 71265421 is about 8441.8849198505. The cubic root of 71265421 is about 414.5971238990.

The spelling of 71265421 in words is "seventy-one million, two hundred sixty-five thousand, four hundred twenty-one".