401442121 has 8 divisors (see below), whose sum is σ = 403891488. Its totient is φ = 399000000.

The previous prime is 401442113. The next prime is 401442133. The reversal of 401442121 is 121244104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401442121 - 2³ = 401442113 is a prime.

It is a super-2 number, since 2×401442121² = 322311553025957282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401442101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141921 + ... + 144721.

It is an arithmetic number, because the mean of its divisors is an integer number (50486436).

Almost surely, 2^401442121 is an apocalyptic number.

It is an amenable number.

401442121 is a deficient number, since it is larger than the sum of its proper divisors (2449367).

401442121 is a wasteful number, since it uses less digits than its factorization.

401442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 401442121 is about 20036.0205879311. The cubic root of 401442121 is about 737.6907075903.

Adding to 401442121 its reverse (121244104), we get a palindrome (522686225).

The spelling of 401442121 in words is "four hundred one million, four hundred forty-two thousand, one hundred twenty-one".