40501001 has 4 divisors (see below), whose sum is σ = 40647492. Its totient is φ = 40354512.

The previous prime is 40500983. The next prime is 40501003. The reversal of 40501001 is 10010504.

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 26988025 + 13512976 = 5195^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 40501001 - 2⁶ = 40500937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40501003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72830 + ... + 73383.

It is an arithmetic number, because the mean of its divisors is an integer number (10161873).

Almost surely, 2^40501001 is an apocalyptic number.

It is an amenable number.

40501001 is a deficient number, since it is larger than the sum of its proper divisors (146491).

40501001 is a wasteful number, since it uses less digits than its factorization.

40501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146490.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 40501001 is about 6364.0396761805. The cubic root of 40501001 is about 343.4171020241.

Adding to 40501001 its reverse (10010504), we get a palindrome (50511505).

The spelling of 40501001 in words is "forty million, five hundred one thousand, one".