6461505 has 32 divisors (see below), whose sum is σ = 11992320. Its totient is φ = 3294720.

The previous prime is 6461471. The next prime is 6461509. The reversal of 6461505 is 5051646.

It is a happy number.

6461505 is a `hidden beast` number, since 646 + 15 + 0 + 5 = 666.

It is not a de Polignac number, because 6461505 - 2⁸ = 6461249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6461509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2065 + ... + 4145.

It is an arithmetic number, because the mean of its divisors is an integer number (374760).

Almost surely, 2^6461505 is an apocalyptic number.

It is an amenable number.

6461505 is a deficient number, since it is larger than the sum of its proper divisors (5530815).

6461505 is a wasteful number, since it uses less digits than its factorization.

6461505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 6461505 is about 2541.9490553510. The cubic root of 6461505 is about 186.2564101513.

The spelling of 6461505 in words is "six million, four hundred sixty-one thousand, five hundred five".