642465237 has 16 divisors (see below), whose sum is σ = 872265600. Its totient is φ = 420513600.

The previous prime is 642465223. The next prime is 642465247. The reversal of 642465237 is 732564246.

It is not a de Polignac number, because 642465237 - 2¹⁰ = 642464213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642465195 and 642465204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642465247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106687 + ... + 112547.

It is an arithmetic number, because the mean of its divisors is an integer number (54516600).

Almost surely, 2^642465237 is an apocalyptic number.

It is an amenable number.

642465237 is a deficient number, since it is larger than the sum of its proper divisors (229800363).

642465237 is a wasteful number, since it uses less digits than its factorization.

642465237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524.

The product of its digits is 241920, while the sum is 39.

The square root of 642465237 is about 25346.8979758865. The cubic root of 642465237 is about 862.8789566828.

Subtracting 642465237 from its reverse (732564246), we obtain a palindrome (90099009).

The spelling of 642465237 in words is "six hundred forty-two million, four hundred sixty-five thousand, two hundred thirty-seven".