40255429 has 2 divisors, whose sum is σ = 40255430. Its totient is φ = 40255428.

The previous prime is 40255421. The next prime is 40255447. The reversal of 40255429 is 92455204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39715204 + 540225 = 6302^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 40255429 - 2³ = 40255421 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40255429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40255421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127714 + 20127715.

It is an arithmetic number, because the mean of its divisors is an integer number (20127715).

Almost surely, 2^40255429 is an apocalyptic number.

It is an amenable number.

40255429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40255429 is an equidigital number, since it uses as much as digits as its factorization.

40255429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 40255429 is about 6344.7166209375. The cubic root of 40255429 is about 342.7216076967.

The spelling of 40255429 in words is "forty million, two hundred fifty-five thousand, four hundred twenty-nine".