40042007 has 2 divisors, whose sum is σ = 40042008. Its totient is φ = 40042006.

The previous prime is 40041997. The next prime is 40042027. The reversal of 40042007 is 70024004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40042007 - 2²² = 35847703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40042027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021003 + 20021004.

It is an arithmetic number, because the mean of its divisors is an integer number (20021004).

Almost surely, 2^40042007 is an apocalyptic number.

40042007 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042007 is an equidigital number, since it uses as much as digits as its factorization.

40042007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 40042007 is about 6327.8753938427. The cubic root of 40042007 is about 342.1148657174.

The spelling of 40042007 in words is "forty million, forty-two thousand, seven".