401042321 has 4 divisors (see below), whose sum is σ = 401901552. Its totient is φ = 400183092.

The previous prime is 401042309. The next prime is 401042339. The reversal of 401042321 is 123240104.

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-401042321 is a prime.

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 401042321.

It is not an unprimeable number, because it can be changed into a prime (401042351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428915 + ... + 429848.

It is an arithmetic number, because the mean of its divisors is an integer number (100475388).

Almost surely, 2^401042321 is an apocalyptic number.

It is an amenable number.

401042321 is a deficient number, since it is larger than the sum of its proper divisors (859231).

401042321 is an equidigital number, since it uses as much as digits as its factorization.

401042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859230.

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

The square root of 401042321 is about 20026.0410715648. The cubic root of 401042321 is about 737.4457352010.

Adding to 401042321 its reverse (123240104), we get a palindrome (524282425).

The spelling of 401042321 in words is "four hundred one million, forty-two thousand, three hundred twenty-one".