205142402 has 8 divisors (see below), whose sum is σ = 309308556. Its totient is φ = 102039552.

The previous prime is 205142389. The next prime is 205142423. The reversal of 205142402 is 204241502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 192404641 + 12737761 = 13871^2 + 3569^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265343 + ... + 266114.

Almost surely, 2^205142402 is an apocalyptic number.

205142402 is a deficient number, since it is larger than the sum of its proper divisors (104166154).

205142402 is a wasteful number, since it uses less digits than its factorization.

205142402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531652.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 205142402 is about 14322.7930935275. The cubic root of 205142402 is about 589.7733516113.

Adding to 205142402 its reverse (204241502), we get a palindrome (409383904).

The spelling of 205142402 in words is "two hundred five million, one hundred forty-two thousand, four hundred two".