400002461 has 2 divisors, whose sum is σ = 400002462. Its totient is φ = 400002460.

The previous prime is 400002443. The next prime is 400002509. The reversal of 400002461 is 164200004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382202500 + 17799961 = 19550^2 + 4219^2 .

It is a cyclic number.

It is not a de Polignac number, because 400002461 - 2⁶ = 400002397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400002431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200001230 + 200001231.

It is an arithmetic number, because the mean of its divisors is an integer number (200001231).

Almost surely, 2^400002461 is an apocalyptic number.

It is an amenable number.

400002461 is a deficient number, since it is larger than the sum of its proper divisors (1).

400002461 is an equidigital number, since it uses as much as digits as its factorization.

400002461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400002461 is about 20000.0615249054. The cubic root of 400002461 is about 736.8078107919.

Adding to 400002461 its reverse (164200004), we get a palindrome (564202465).

The spelling of 400002461 in words is "four hundred million, two thousand, four hundred sixty-one".