405018001 has 2 divisors, whose sum is σ = 405018002. Its totient is φ = 405018000.

The previous prime is 405017969. The next prime is 405018011. The reversal of 405018001 is 100810504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324000000 + 81018001 = 18000^2 + 9001^2 .

It is a cyclic number.

It is not a de Polignac number, because 405018001 - 2⁵ = 405017969 is a prime.

It is a super-2 number, since 2×405018001² = 328079162268072002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405018001.

It is not a weakly prime, because it can be changed into another prime (405018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202509000 + 202509001.

It is an arithmetic number, because the mean of its divisors is an integer number (202509001).

Almost surely, 2^405018001 is an apocalyptic number.

It is an amenable number.

405018001 is a deficient number, since it is larger than the sum of its proper divisors (1).

405018001 is an equidigital number, since it uses as much as digits as its factorization.

405018001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 405018001 is about 20125.0590309693. The cubic root of 405018001 is about 739.8745836882.

Adding to 405018001 its reverse (100810504), we get a palindrome (505828505).

The spelling of 405018001 in words is "four hundred five million, eighteen thousand, one".