1642235429 has 2 divisors, whose sum is σ = 1642235430. Its totient is φ = 1642235428.

The previous prime is 1642235389. The next prime is 1642235431. The reversal of 1642235429 is 9245322461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1573312225 + 68923204 = 39665^2 + 8302^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642235429 - 2¹² = 1642231333 is a prime.

Together with 1642235431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642235392 and 1642235401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642235629) 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, 821117714 + 821117715.

It is an arithmetic number, because the mean of its divisors is an integer number (821117715).

Almost surely, 2^1642235429 is an apocalyptic number.

It is an amenable number.

1642235429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642235429 is an equidigital number, since it uses as much as digits as its factorization.

1642235429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 1642235429 is about 40524.5040561880. The cubic root of 1642235429 is about 1179.8092742111.

The spelling of 1642235429 in words is "one billion, six hundred forty-two million, two hundred thirty-five thousand, four hundred twenty-nine".