402247405 has 32 divisors (see below), whose sum is σ = 559063296. Its totient is φ = 272154624.

The previous prime is 402247361. The next prime is 402247409. The reversal of 402247405 is 504742204.

It is a happy number.

It is not a de Polignac number, because 402247405 - 2⁹ = 402246893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402247409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565037 + ... + 1565293.

It is an arithmetic number, because the mean of its divisors is an integer number (17470728).

Almost surely, 2^402247405 is an apocalyptic number.

It is an amenable number.

402247405 is a deficient number, since it is larger than the sum of its proper divisors (156815891).

402247405 is a wasteful number, since it uses less digits than its factorization.

402247405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 402247405 is about 20056.1064267220. The cubic root of 402247405 is about 738.1836418701.

Adding to 402247405 its reverse (504742204), we get a palindrome (906989609).

The spelling of 402247405 in words is "four hundred two million, two hundred forty-seven thousand, four hundred five".