6461491 has 4 divisors (see below), whose sum is σ = 6467392. Its totient is φ = 6455592.

The previous prime is 6461471. The next prime is 6461509. The reversal of 6461491 is 1941646.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6461491 - 2¹¹ = 6459443 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461401) 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, 771 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (1616848).

Almost surely, 2^6461491 is an apocalyptic number.

6461491 is a deficient number, since it is larger than the sum of its proper divisors (5901).

6461491 is a wasteful number, since it uses less digits than its factorization.

6461491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900.

The product of its digits is 5184, while the sum is 31.

The square root of 6461491 is about 2541.9463015571. The cubic root of 6461491 is about 186.2562756320.

The spelling of 6461491 in words is "six million, four hundred sixty-one thousand, four hundred ninety-one".