400564061 has 4 divisors (see below), whose sum is σ = 421646400. Its totient is φ = 379481724.

The previous prime is 400563937. The next prime is 400564063. The reversal of 400564061 is 160465004.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 400564061 - 2¹⁸ = 400301917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 400564061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400564063) 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, 10541141 + ... + 10541178.

It is an arithmetic number, because the mean of its divisors is an integer number (105411600).

Almost surely, 2^400564061 is an apocalyptic number.

It is an amenable number.

400564061 is a deficient number, since it is larger than the sum of its proper divisors (21082339).

400564061 is a wasteful number, since it uses less digits than its factorization.

400564061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21082338.

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

The square root of 400564061 is about 20014.0965571769. The cubic root of 400564061 is about 737.1524734750.

The spelling of 400564061 in words is "four hundred million, five hundred sixty-four thousand, sixty-one".