200405242 has 4 divisors (see below), whose sum is σ = 300607866. Its totient is φ = 100202620.

The previous prime is 200405189. The next prime is 200405281. The reversal of 200405242 is 242504002.

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

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 87216921 = 10639^2 + 9339^2 .

It is a super-2 number, since 2×200405242² = 80324522042157128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50101309 + ... + 50101312.

Almost surely, 2^200405242 is an apocalyptic number.

200405242 is a deficient number, since it is larger than the sum of its proper divisors (100202624).

200405242 is a wasteful number, since it uses less digits than its factorization.

200405242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100202623.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 200405242 is about 14156.4558417706. The cubic root of 200405242 is about 585.1982594382.

Adding to 200405242 its reverse (242504002), we get a palindrome (442909244).

The spelling of 200405242 in words is "two hundred million, four hundred five thousand, two hundred forty-two".