40101001 has 4 divisors (see below), whose sum is σ = 42211600. Its totient is φ = 37990404.

The previous prime is 40100999. The next prime is 40101031. The reversal of 40101001 is 10010104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40101001 - 2¹ = 40100999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40101031) 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, 1055271 + ... + 1055308.

It is an arithmetic number, because the mean of its divisors is an integer number (10552900).

Almost surely, 2^40101001 is an apocalyptic number.

It is an amenable number.

40101001 is a deficient number, since it is larger than the sum of its proper divisors (2110599).

40101001 is a wasteful number, since it uses less digits than its factorization.

40101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110598.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 40101001 is about 6332.5351163653. The cubic root of 40101001 is about 342.2827962005.

Adding to 40101001 its reverse (10010104), we get a palindrome (50111105).

The spelling of 40101001 in words is "forty million, one hundred one thousand, one".