401305121 has 4 divisors (see below), whose sum is σ = 458634432. Its totient is φ = 343975812.

The previous prime is 401305087. The next prime is 401305133. The reversal of 401305121 is 121503104.

Added to its reverse (121503104) it gives a square (522808225 = 22865²).

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 a de Polignac number, because none of the positive numbers 2^k-401305121 is a prime.

It is a super-2 number, since 2×401305121² = 322091600281649282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401305121.

It is not an unprimeable number, because it can be changed into a prime (401305321) 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, 28664645 + ... + 28664658.

It is an arithmetic number, because the mean of its divisors is an integer number (114658608).

Almost surely, 2^401305121 is an apocalyptic number.

It is an amenable number.

401305121 is a deficient number, since it is larger than the sum of its proper divisors (57329311).

401305121 is an equidigital number, since it uses as much as digits as its factorization.

401305121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57329310.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 401305121 is about 20032.6014536305. The cubic root of 401305121 is about 737.6067808999.

Adding to 401305121 its reverse (121503104), we get a palindrome (522808225).

The spelling of 401305121 in words is "four hundred one million, three hundred five thousand, one hundred twenty-one".