40905101 has 4 divisors (see below), whose sum is σ = 41310204. Its totient is φ = 40500000.

The previous prime is 40905097. The next prime is 40905107. The reversal of 40905101 is 10150904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37393225 + 3511876 = 6115^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 40905101 - 2² = 40905097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40905107) 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 3 ways as a sum of consecutive naturals, for example, 202400 + ... + 202601.

It is an arithmetic number, because the mean of its divisors is an integer number (10327551).

Almost surely, 2^40905101 is an apocalyptic number.

It is an amenable number.

40905101 is a deficient number, since it is larger than the sum of its proper divisors (405103).

40905101 is a wasteful number, since it uses less digits than its factorization.

40905101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405102.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 40905101 is about 6395.7095775215. The cubic root of 40905101 is about 344.5554759368. Note that the first 3 decimals are identical.

The spelling of 40905101 in words is "forty million, nine hundred five thousand, one hundred one".