642345441 has 8 divisors (see below), whose sum is σ = 856577664. Its totient is φ = 428171760.

The previous prime is 642345439. The next prime is 642345463. The reversal of 642345441 is 144543246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642345441 - 2¹ = 642345439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642345421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35896 + ... + 50726.

It is an arithmetic number, because the mean of its divisors is an integer number (107072208).

Almost surely, 2^642345441 is an apocalyptic number.

It is an amenable number.

642345441 is a deficient number, since it is larger than the sum of its proper divisors (214232223).

642345441 is a wasteful number, since it uses less digits than its factorization.

642345441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29271.

The product of its digits is 46080, while the sum is 33.

The square root of 642345441 is about 25344.5347363095. The cubic root of 642345441 is about 862.8253216807.

Adding to 642345441 its reverse (144543246), we get a palindrome (786888687).

The spelling of 642345441 in words is "six hundred forty-two million, three hundred forty-five thousand, four hundred forty-one".