201420434 has 4 divisors (see below), whose sum is σ = 302130654. Its totient is φ = 100710216.

The previous prime is 201420431. The next prime is 201420449. The reversal of 201420434 is 434024102.

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., 200307409 + 1113025 = 14153^2 + 1055^2 .

It is not an unprimeable number, because it can be changed into a prime (201420431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50355107 + ... + 50355110.

Almost surely, 2^201420434 is an apocalyptic number.

201420434 is a deficient number, since it is larger than the sum of its proper divisors (100710220).

201420434 is a wasteful number, since it uses less digits than its factorization.

201420434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100710219.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 201420434 is about 14192.2666970431. The cubic root of 201420434 is about 586.1847410322.

Adding to 201420434 its reverse (434024102), we get a palindrome (635444536).

The spelling of 201420434 in words is "two hundred one million, four hundred twenty thousand, four hundred thirty-four".