401424561 has 6 divisors (see below), whose sum is σ = 579835490. Its totient is φ = 267616368.

The previous prime is 401424559. The next prime is 401424577. The reversal of 401424561 is 165424104.

It can be written as a sum of positive squares in only one way, i.e., 362673936 + 38750625 = 19044^2 + 6225^2 .

It is not a de Polignac number, because 401424561 - 2¹ = 401424559 is a prime.

It is a super-2 number, since 2×401424561² = 322283356348085442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401424511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22301356 + ... + 22301373.

Almost surely, 2^401424561 is an apocalyptic number.

It is an amenable number.

401424561 is a deficient number, since it is larger than the sum of its proper divisors (178410929).

401424561 is a wasteful number, since it uses less digits than its factorization.

401424561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44602735 (or 44602732 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 401424561 is about 20035.5823723694. The cubic root of 401424561 is about 737.6799513384.

Adding to 401424561 its reverse (165424104), we get a palindrome (566848665).

The spelling of 401424561 in words is "four hundred one million, four hundred twenty-four thousand, five hundred sixty-one".