71421875 has 28 divisors (see below), whose sum is σ = 102186192. Its totient is φ = 48900000.

The previous prime is 71421871. The next prime is 71421881. The reversal of 71421875 is 57812417.

It is not a de Polignac number, because 71421875 - 2² = 71421871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71421871) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 109049 + ... + 109701.

Almost surely, 2^71421875 is an apocalyptic number.

71421875 is a deficient number, since it is larger than the sum of its proper divisors (30764317).

71421875 is an frugal number, since it uses more digits than its factorization.

71421875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 665 counting only the distinct ones).

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

The square root of 71421875 is about 8451.1463719427. The cubic root of 71421875 is about 414.9003002383.

The spelling of 71421875 in words is "seventy-one million, four hundred twenty-one thousand, eight hundred seventy-five".