40920001 has 2 divisors, whose sum is σ = 40920002. Its totient is φ = 40920000.

The previous prime is 40919999. The next prime is 40920007. The reversal of 40920001 is 10002904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31091776 + 9828225 = 5576^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 40920001 - 2¹ = 40919999 is a prime.

Together with 40919999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40920007) 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 as a sum of consecutive naturals, namely, 20460000 + 20460001.

It is an arithmetic number, because the mean of its divisors is an integer number (20460001).

Almost surely, 2^40920001 is an apocalyptic number.

It is an amenable number.

40920001 is a deficient number, since it is larger than the sum of its proper divisors (1).

40920001 is an equidigital number, since it uses as much as digits as its factorization.

40920001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 40920001 is about 6396.8743148510. The cubic root of 40920001 is about 344.5973065255.

Adding to 40920001 its reverse (10002904), we get a palindrome (50922905).

The spelling of 40920001 in words is "forty million, nine hundred twenty thousand, one".