401154021 has 24 divisors (see below), whose sum is σ = 592375680. Its totient is φ = 261533376.

The previous prime is 401154007. The next prime is 401154077. The reversal of 401154021 is 120451104.

It is not a de Polignac number, because 401154021 - 2⁵ = 401153989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 401153985 and 401154003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401154421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73441 + ... + 78713.

It is an arithmetic number, because the mean of its divisors is an integer number (24682320).

Almost surely, 2^401154021 is an apocalyptic number.

It is an amenable number.

401154021 is a deficient number, since it is larger than the sum of its proper divisors (191221659).

401154021 is a wasteful number, since it uses less digits than its factorization.

401154021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465 (or 5462 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 401154021 is about 20028.8297461434. The cubic root of 401154021 is about 737.5141943452.

The spelling of 401154021 in words is "four hundred one million, one hundred fifty-four thousand, twenty-one".