5640461 has 2 divisors, whose sum is σ = 5640462. Its totient is φ = 5640460.

The previous prime is 5640457. The next prime is 5640463. The reversal of 5640461 is 1640465.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3924361 + 1716100 = 1981^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640461 - 2² = 5640457 is a prime.

Together with 5640463, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5640461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5640463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820230 + 2820231.

It is an arithmetic number, because the mean of its divisors is an integer number (2820231).

Almost surely, 2^5640461 is an apocalyptic number.

It is an amenable number.

5640461 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640461 is an equidigital number, since it uses as much as digits as its factorization.

5640461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 5640461 is about 2374.9654734332. The cubic root of 5640461 is about 178.0074587625.

It can be divided in two parts, 56404 and 61, that added together give a palindrome (56465).

The spelling of 5640461 in words is "five million, six hundred forty thousand, four hundred sixty-one".