6461765 has 4 divisors (see below), whose sum is σ = 7754124. Its totient is φ = 5169408.

The previous prime is 6461761. The next prime is 6461773. The reversal of 6461765 is 5671646.

It is a Cunningham number, because it is equal to 2542²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2328676 + 4133089 = 1526^2 + 2033^2 .

It is a cyclic number.

It is not a de Polignac number, because 6461765 - 2² = 6461761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461761) 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, 646172 + ... + 646181.

It is an arithmetic number, because the mean of its divisors is an integer number (1938531).

Almost surely, 2^6461765 is an apocalyptic number.

It is an amenable number.

6461765 is a deficient number, since it is larger than the sum of its proper divisors (1292359).

6461765 is a wasteful number, since it uses less digits than its factorization.

6461765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292358.

The product of its digits is 30240, while the sum is 35.

The square root of 6461765 is about 2542.0001966955. Note that the first 3 decimals coincide. The cubic root of 6461765 is about 186.2589083318.

The spelling of 6461765 in words is "six million, four hundred sixty-one thousand, seven hundred sixty-five".