401100521 has 4 divisors (see below), whose sum is σ = 404849232. Its totient is φ = 397351812.

The previous prime is 401100503. The next prime is 401100523. The reversal of 401100521 is 125001104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401100521 - 2¹⁰ = 401099497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401100496 and 401100505.

It is not an unprimeable number, because it can be changed into a prime (401100523) 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, 1874195 + ... + 1874408.

It is an arithmetic number, because the mean of its divisors is an integer number (101212308).

Almost surely, 2^401100521 is an apocalyptic number.

It is an amenable number.

401100521 is a deficient number, since it is larger than the sum of its proper divisors (3748711).

401100521 is a wasteful number, since it uses less digits than its factorization.

401100521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748710.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 401100521 is about 20027.4941268248. The cubic root of 401100521 is about 737.4814066365.

Adding to 401100521 its reverse (125001104), we get a palindrome (526101625).

The spelling of 401100521 in words is "four hundred one million, one hundred thousand, five hundred twenty-one".