402420243 has 16 divisors (see below), whose sum is σ = 571946400. Its totient is φ = 250799616.

The previous prime is 402420229. The next prime is 402420253. The reversal of 402420243 is 342024204.

It is not a de Polignac number, because 402420243 - 2¹⁶ = 402354707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402420203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18880 + ... + 34077.

It is an arithmetic number, because the mean of its divisors is an integer number (35746650).

Almost surely, 2^402420243 is an apocalyptic number.

402420243 is a deficient number, since it is larger than the sum of its proper divisors (169526157).

402420243 is a wasteful number, since it uses less digits than its factorization.

402420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53126.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 402420243 is about 20060.4148262193. The cubic root of 402420243 is about 738.2893545180.

Adding to 402420243 its reverse (342024204), we get a palindrome (744444447).

The spelling of 402420243 in words is "four hundred two million, four hundred twenty thousand, two hundred forty-three".