401021185 has 4 divisors (see below), whose sum is σ = 481225428. Its totient is φ = 320816944.

The previous prime is 401021149. The next prime is 401021209. The reversal of 401021185 is 581120104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 281971264 + 119049921 = 16792^2 + 10911^2 .

It is a cyclic number.

It is not a de Polignac number, because 401021185 - 2²¹ = 398924033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40102114 + ... + 40102123.

It is an arithmetic number, because the mean of its divisors is an integer number (120306357).

Almost surely, 2^401021185 is an apocalyptic number.

It is an amenable number.

401021185 is a deficient number, since it is larger than the sum of its proper divisors (80204243).

401021185 is an equidigital number, since it uses as much as digits as its factorization.

401021185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80204242.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 401021185 is about 20025.5133517221. The cubic root of 401021185 is about 737.4327798544.

Adding to 401021185 its reverse (581120104), we get a palindrome (982141289).

The spelling of 401021185 in words is "four hundred one million, twenty-one thousand, one hundred eighty-five".