40011001 has 2 divisors, whose sum is σ = 40011002. Its totient is φ = 40011000.

The previous prime is 40010989. The next prime is 40011019. The reversal of 40011001 is 10011004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 18481401 = 4640^2 + 4299^2 .

It is a cyclic number.

It is not a de Polignac number, because 40011001 - 2¹¹ = 40008953 is a prime.

It is not a weakly prime, because it can be changed into another prime (40011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005500 + 20005501.

It is an arithmetic number, because the mean of its divisors is an integer number (20005501).

Almost surely, 2^40011001 is an apocalyptic number.

It is an amenable number.

40011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

40011001 is an equidigital number, since it uses as much as digits as its factorization.

40011001 is an evil number, because the sum of its binary digits is even.

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

The square root of 40011001 is about 6325.4249659608. The cubic root of 40011001 is about 342.0265388705.

Adding to 40011001 its reverse (10011004), we get a palindrome (50022005).

The spelling of 40011001 in words is "forty million, eleven thousand, one".