402430243 has 4 divisors (see below), whose sum is σ = 402551568. Its totient is φ = 402308920.

The previous prime is 402430181. The next prime is 402430253. The reversal of 402430243 is 342034204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402430243 - 2¹⁷ = 402299171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402430253) 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 3 ways as a sum of consecutive naturals, for example, 55543 + ... + 62368.

It is an arithmetic number, because the mean of its divisors is an integer number (100637892).

Almost surely, 2^402430243 is an apocalyptic number.

402430243 is a deficient number, since it is larger than the sum of its proper divisors (121325).

402430243 is a wasteful number, since it uses less digits than its factorization.

402430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121324.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 402430243 is about 20060.6640717599. The cubic root of 402430243 is about 738.2954698767.

Adding to 402430243 its reverse (342034204), we get a palindrome (744464447).

The spelling of 402430243 in words is "four hundred two million, four hundred thirty thousand, two hundred forty-three".