401224681 has 32 divisors (see below), whose sum is σ = 484662528. Its totient is φ = 327325440.

The previous prime is 401224679. The next prime is 401224687. The reversal of 401224681 is 186422104.

It is not a de Polignac number, because 401224681 - 2¹ = 401224679 is a prime.

It is a super-2 number, since 2×401224681² = 321962489287103522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401224687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1265535 + ... + 1265851.

It is an arithmetic number, because the mean of its divisors is an integer number (15145704).

Almost surely, 2^401224681 is an apocalyptic number.

It is an amenable number.

401224681 is a deficient number, since it is larger than the sum of its proper divisors (83437847).

401224681 is a wasteful number, since it uses less digits than its factorization.

401224681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 401224681 is about 20030.5936257516. The cubic root of 401224681 is about 737.5574941676.

Adding to 401224681 its reverse (186422104), we get a palindrome (587646785).

The spelling of 401224681 in words is "four hundred one million, two hundred twenty-four thousand, six hundred eighty-one".