40405101 has 32 divisors (see below), whose sum is σ = 60825600. Its totient is φ = 23647680.

The previous prime is 40405097. The next prime is 40405109. The reversal of 40405101 is 10150404.

It is not a de Polignac number, because 40405101 - 2² = 40405097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40405109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168940 + ... + 169178.

It is an arithmetic number, because the mean of its divisors is an integer number (1900800).

Almost surely, 2^40405101 is an apocalyptic number.

It is an amenable number.

40405101 is a deficient number, since it is larger than the sum of its proper divisors (20420499).

40405101 is a wasteful number, since it uses less digits than its factorization.

40405101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 40405101 is about 6356.5006882718. The cubic root of 40405101 is about 343.1458352450.

Adding to 40405101 its reverse (10150404), we get a palindrome (50555505).

The spelling of 40405101 in words is "forty million, four hundred five thousand, one hundred one".