1634143426 has 4 divisors (see below), whose sum is σ = 2451215142. Its totient is φ = 817071712.

The previous prime is 1634143421. The next prime is 1634143429. The reversal of 1634143426 is 6243414361.

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., 1271279025 + 362864401 = 35655^2 + 19049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1634143391 and 1634143400.

It is not an unprimeable number, because it can be changed into a prime (1634143421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408535855 + ... + 408535858.

Almost surely, 2^1634143426 is an apocalyptic number.

1634143426 is a deficient number, since it is larger than the sum of its proper divisors (817071716).

1634143426 is an equidigital number, since it uses as much as digits as its factorization.

1634143426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817071715.

The product of its digits is 41472, while the sum is 34.

The square root of 1634143426 is about 40424.5398984330. The cubic root of 1634143426 is about 1177.8682727672.

Adding to 1634143426 its reverse (6243414361), we get a palindrome (7877557787).

The spelling of 1634143426 in words is "one billion, six hundred thirty-four million, one hundred forty-three thousand, four hundred twenty-six".