42134644 has 6 divisors (see below), whose sum is σ = 73735634. Its totient is φ = 21067320.

The previous prime is 42134641. The next prime is 42134671. The reversal of 42134644 is 44643124.

It can be written as a sum of positive squares in only one way, i.e., 33062500 + 9072144 = 5750^2 + 3012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42134641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5266827 + ... + 5266834.

Almost surely, 2^42134644 is an apocalyptic number.

It is an amenable number.

42134644 is a deficient number, since it is larger than the sum of its proper divisors (31600990).

42134644 is a wasteful number, since it uses less digits than its factorization.

42134644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533665 (or 10533663 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 42134644 is about 6491.1203963569. The cubic root of 42134644 is about 347.9737175729.

Adding to 42134644 its reverse (44643124), we get a palindrome (86777768).

It can be divided in two parts, 42134 and 644, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42134644 in words is "forty-two million, one hundred thirty-four thousand, six hundred forty-four".