405330121 has 4 divisors (see below), whose sum is σ = 463234432. Its totient is φ = 347425812.

The previous prime is 405330103. The next prime is 405330143. The reversal of 405330121 is 121033504.

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 405330121 - 2⁵ = 405330089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405330181) 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, 28952145 + ... + 28952158.

It is an arithmetic number, because the mean of its divisors is an integer number (115808608).

Almost surely, 2^405330121 is an apocalyptic number.

It is an amenable number.

405330121 is a deficient number, since it is larger than the sum of its proper divisors (57904311).

405330121 is an equidigital number, since it uses as much as digits as its factorization.

405330121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57904310.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 405330121 is about 20132.8120489911. The cubic root of 405330121 is about 740.0645920000.

Adding to 405330121 its reverse (121033504), we get a palindrome (526363625).

The spelling of 405330121 in words is "four hundred five million, three hundred thirty thousand, one hundred twenty-one".