405201001 has 8 divisors (see below), whose sum is σ = 429514920. Its totient is φ = 380940288.

The previous prime is 405200987. The next prime is 405201019. The reversal of 405201001 is 100102504.

It can be written as a sum of positive squares in 4 ways, for example, as 5400976 + 399800025 = 2324^2 + 19995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405201001 is a prime.

It is a super-2 number, since 2×405201001² = 328375702422804002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405201091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965 + ... + 28621.

It is an arithmetic number, because the mean of its divisors is an integer number (53689365).

Almost surely, 2^405201001 is an apocalyptic number.

It is an amenable number.

405201001 is a deficient number, since it is larger than the sum of its proper divisors (24313919).

405201001 is a wasteful number, since it uses less digits than its factorization.

405201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26603.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 405201001 is about 20129.6050880289. The cubic root of 405201001 is about 739.9859998569.

Adding to 405201001 its reverse (100102504), we get a palindrome (505303505).

The spelling of 405201001 in words is "four hundred five million, two hundred one thousand, one".