400014561 has 4 divisors (see below), whose sum is σ = 533352752. Its totient is φ = 266676372.

The previous prime is 400014529. The next prime is 400014569. The reversal of 400014561 is 165410004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 400014561 - 2⁵ = 400014529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400014569) 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 in 3 ways as a sum of consecutive naturals, for example, 66669091 + ... + 66669096.

It is an arithmetic number, because the mean of its divisors is an integer number (133338188).

Almost surely, 2^400014561 is an apocalyptic number.

It is an amenable number.

400014561 is a deficient number, since it is larger than the sum of its proper divisors (133338191).

400014561 is a wasteful number, since it uses less digits than its factorization.

400014561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133338190.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 400014561 is about 20000.3640216872. The cubic root of 400014561 is about 736.8152401500.

Adding to 400014561 its reverse (165410004), we get a palindrome (565424565).

It can be divided in two parts, 4000145 and 61, that added together give a triangular number (4000206 = T₂₈₂₈).

The spelling of 400014561 in words is "four hundred million, fourteen thousand, five hundred sixty-one".