71587421 has 8 divisors (see below), whose sum is σ = 76024320. Its totient is φ = 67217472.

The previous prime is 71587403. The next prime is 71587427. The reversal of 71587421 is 12478517.

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 71587421 - 2¹⁰ = 71586397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71587427) 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, 14525 + ... + 18818.

It is an arithmetic number, because the mean of its divisors is an integer number (9503040).

Almost surely, 2^71587421 is an apocalyptic number.

It is an amenable number.

71587421 is a deficient number, since it is larger than the sum of its proper divisors (4436899).

71587421 is a wasteful number, since it uses less digits than its factorization.

71587421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33475.

The product of its digits is 15680, while the sum is 35.

The square root of 71587421 is about 8460.9349956137. The cubic root of 71587421 is about 415.2206133349.

The spelling of 71587421 in words is "seventy-one million, five hundred eighty-seven thousand, four hundred twenty-one".