71650 has 12 divisors (see below), whose sum is σ = 133362. Its totient is φ = 28640.

The previous prime is 71647. The next prime is 71663. The reversal of 71650 is 5617.

It can be written as a sum of positive squares in 3 ways, for example, as 63001 + 8649 = 251^2 + 93^2 .

It is an Ulam number.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667 + ... + 766.

2⁷¹⁶⁵⁰ is an apocalyptic number.

71650 is a deficient number, since it is larger than the sum of its proper divisors (61712).

71650 is a wasteful number, since it uses less digits than its factorization.

71650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 71650 is about 267.6751762865. The cubic root of 71650 is about 41.5341568118.

Subtracting from 71650 its sum of digits (19), we obtain a triangular number (71631 = T₃₇₈).

The spelling of 71650 in words is "seventy-one thousand, six hundred fifty".