671654 has 8 divisors (see below), whose sum is σ = 1011000. Its totient is φ = 334656.

The previous prime is 671651. The next prime is 671681. The reversal of 671654 is 456176.

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

It is a super-2 number, since 2×671654² = 902238191432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662 + ... + 1334.

It is an arithmetic number, because the mean of its divisors is an integer number (126375).

2⁶⁷¹⁶⁵⁴ is an apocalyptic number.

671654 is a deficient number, since it is larger than the sum of its proper divisors (339346).

671654 is a wasteful number, since it uses less digits than its factorization.

671654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174.

The product of its digits is 5040, while the sum is 29.

The square root of 671654 is about 819.5449957141. The cubic root of 671654 is about 87.5753473437.

It can be divided in two parts, 671 and 654, that multiplied together give a palindrome (438834).

The spelling of 671654 in words is "six hundred seventy-one thousand, six hundred fifty-four".