402042266 has 4 divisors (see below), whose sum is σ = 603063402. Its totient is φ = 201021132.

The previous prime is 402042253. The next prime is 402042301. The reversal of 402042266 is 662240204.

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., 261501241 + 140541025 = 16171^2 + 11855^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510565 + ... + 100510568.

Almost surely, 2^402042266 is an apocalyptic number.

402042266 is a deficient number, since it is larger than the sum of its proper divisors (201021136).

402042266 is a wasteful number, since it uses less digits than its factorization.

402042266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201021135.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 402042266 is about 20050.9916463002. The cubic root of 402042266 is about 738.0581337030.

The spelling of 402042266 in words is "four hundred two million, forty-two thousand, two hundred sixty-six".