401001123 has 4 divisors (see below), whose sum is σ = 534668168. Its totient is φ = 267334080.

The previous prime is 401001121. The next prime is 401001193. The reversal of 401001123 is 321100104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401001123 - 2¹ = 401001121 is a prime.

It is a super-2 number, since 2×401001123² = 321603801294522258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401001099 and 401001108.

It is not an unprimeable number, because it can be changed into a prime (401001121) 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, 66833518 + ... + 66833523.

It is an arithmetic number, because the mean of its divisors is an integer number (133667042).

Almost surely, 2^401001123 is an apocalyptic number.

401001123 is a deficient number, since it is larger than the sum of its proper divisors (133667045).

401001123 is a wasteful number, since it uses less digits than its factorization.

401001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133667044.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 401001123 is about 20025.0124344531. The cubic root of 401001123 is about 737.4204823967.

Adding to 401001123 its reverse (321100104), we get a palindrome (722101227).

The spelling of 401001123 in words is "four hundred one million, one thousand, one hundred twenty-three".