405011001 has 32 divisors (see below), whose sum is σ = 573308928. Its totient is φ = 253955520.

The previous prime is 405010999. The next prime is 405011029. The reversal of 405011001 is 100110504.

It is a happy number.

It is not a de Polignac number, because 405011001 - 2¹ = 405010999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405011401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625660 + ... + 626306.

It is an arithmetic number, because the mean of its divisors is an integer number (17915904).

Almost surely, 2^405011001 is an apocalyptic number.

It is an amenable number.

405011001 is a deficient number, since it is larger than the sum of its proper divisors (168297927).

405011001 is a wasteful number, since it uses less digits than its factorization.

405011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 405011001 is about 20124.8851176845. The cubic root of 405011001 is about 739.8703212012.

Adding to 405011001 its reverse (100110504), we get a palindrome (505121505).

It can be divided in two parts, 4050 and 11001, that added together give a palindrome (15051).

The spelling of 405011001 in words is "four hundred five million, eleven thousand, one".