671717142 has 24 divisors (see below), whose sum is σ = 1458190344. Its totient is φ = 223474464.

The previous prime is 671717113. The next prime is 671717149. The reversal of 671717142 is 241717176.

It is a junction number, because it is equal to n+sod(n) for n = 671717097 and 671717106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671717149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26263 + ... + 45090.

It is an arithmetic number, because the mean of its divisors is an integer number (60757931).

Almost surely, 2^671717142 is an apocalyptic number.

671717142 is an abundant number, since it is smaller than the sum of its proper divisors (786473202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671717142 is a wasteful number, since it uses less digits than its factorization.

671717142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71884 (or 71881 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 671717142 is about 25917.5064772829. The cubic root of 671717142 is about 875.7809156884.

The spelling of 671717142 in words is "six hundred seventy-one million, seven hundred seventeen thousand, one hundred forty-two".