6461671 has 4 divisors (see below), whose sum is σ = 6670144. Its totient is φ = 6253200.

The previous prime is 6461657. The next prime is 6461713. The reversal of 6461671 is 1761646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1761646 = 2 ⋅880823.

It is a cyclic number.

It is not a de Polignac number, because 6461671 - 2¹¹ = 6459623 is a prime.

It is a super-2 number, since 2×6461671² = 83506384224482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 208441 = 6461671 / (6 + 4 + 6 + 1 + 6 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461471) 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, 104190 + ... + 104251.

It is an arithmetic number, because the mean of its divisors is an integer number (1667536).

Almost surely, 2^6461671 is an apocalyptic number.

6461671 is a deficient number, since it is larger than the sum of its proper divisors (208473).

6461671 is a wasteful number, since it uses less digits than its factorization.

6461671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208472.

The product of its digits is 6048, while the sum is 31.

The square root of 6461671 is about 2541.9817072513. The cubic root of 6461671 is about 186.2580051512.

The spelling of 6461671 in words is "six million, four hundred sixty-one thousand, six hundred seventy-one".