400205461 has 4 divisors (see below), whose sum is σ = 400734892. Its totient is φ = 399676032.

The previous prime is 400205459. The next prime is 400205471. The reversal of 400205461 is 164502004.

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 353214436 + 46991025 = 18794^2 + 6855^2 .

It is a cyclic number.

It is not a de Polignac number, because 400205461 - 2¹ = 400205459 is a prime.

It is a super-2 number, since 2×400205461² = 320328822028445042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400205401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263580 + ... + 265093.

It is an arithmetic number, because the mean of its divisors is an integer number (100183723).

Almost surely, 2^400205461 is an apocalyptic number.

It is an amenable number.

400205461 is a deficient number, since it is larger than the sum of its proper divisors (529431).

400205461 is an equidigital number, since it uses as much as digits as its factorization.

400205461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529430.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 400205461 is about 20005.1358655721. The cubic root of 400205461 is about 736.9324322671.

Adding to 400205461 its reverse (164502004), we get a palindrome (564707465).

The spelling of 400205461 in words is "four hundred million, two hundred five thousand, four hundred sixty-one".