401221043 has 16 divisors (see below), whose sum is σ = 429369600. Its totient is φ = 373831200.

The previous prime is 401221031. The next prime is 401221099. The reversal of 401221043 is 340122104.

It is a cyclic number.

It is not a de Polignac number, because 401221043 - 2⁴ = 401221027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401221243) 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 15 ways as a sum of consecutive naturals, for example, 312080 + ... + 313362.

It is an arithmetic number, because the mean of its divisors is an integer number (26835600).

Almost surely, 2^401221043 is an apocalyptic number.

401221043 is a deficient number, since it is larger than the sum of its proper divisors (28148557).

401221043 is a wasteful number, since it uses less digits than its factorization.

401221043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401221043 is about 20030.5028144578. The cubic root of 401221043 is about 737.5552649575. Note that the first 3 decimals are identical.

Adding to 401221043 its reverse (340122104), we get a palindrome (741343147).

The spelling of 401221043 in words is "four hundred one million, two hundred twenty-one thousand, forty-three".