201430426 has 4 divisors (see below), whose sum is σ = 302145642. Its totient is φ = 100715212.

The previous prime is 201430409. The next prime is 201430429. The reversal of 201430426 is 624034102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624034102 = 2 ⋅312017051.

It can be written as a sum of positive squares in only one way, i.e., 197824225 + 3606201 = 14065^2 + 1899^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 201430397 and 201430406.

It is not an unprimeable number, because it can be changed into a prime (201430429) 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, 50357605 + ... + 50357608.

Almost surely, 2^201430426 is an apocalyptic number.

201430426 is a deficient number, since it is larger than the sum of its proper divisors (100715216).

201430426 is a wasteful number, since it uses less digits than its factorization.

201430426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100715215.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 201430426 is about 14192.6187153746. The cubic root of 201430426 is about 586.1944339598.

Adding to 201430426 its reverse (624034102), we get a palindrome (825464528).

The spelling of 201430426 in words is "two hundred one million, four hundred thirty thousand, four hundred twenty-six".