40120651 has 2 divisors, whose sum is σ = 40120652. Its totient is φ = 40120650.

The previous prime is 40120643. The next prime is 40120667. The reversal of 40120651 is 15602104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40120651 - 2³ = 40120643 is a prime.

It is not a weakly prime, because it can be changed into another prime (40120631) 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, 20060325 + 20060326.

It is an arithmetic number, because the mean of its divisors is an integer number (20060326).

Almost surely, 2^40120651 is an apocalyptic number.

40120651 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120651 is an equidigital number, since it uses as much as digits as its factorization.

40120651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40120651 is about 6334.0864376799. The cubic root of 40120651 is about 342.3386947108.

Adding to 40120651 its reverse (15602104), we get a palindrome (55722755).

The spelling of 40120651 in words is "forty million, one hundred twenty thousand, six hundred fifty-one".