40406459 has 2 divisors, whose sum is σ = 40406460. Its totient is φ = 40406458.

The previous prime is 40406441. The next prime is 40406489. The reversal of 40406459 is 95460404.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40406459 - 2¹² = 40402363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40406489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203229 + 20203230.

It is an arithmetic number, because the mean of its divisors is an integer number (20203230).

Almost surely, 2^40406459 is an apocalyptic number.

40406459 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406459 is an equidigital number, since it uses as much as digits as its factorization.

40406459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40406459 is about 6356.6075071535. The cubic root of 40406459 is about 343.1496795354.

The spelling of 40406459 in words is "forty million, four hundred six thousand, four hundred fifty-nine".