42126544 has 20 divisors (see below), whose sum is σ = 86421924. Its totient is φ = 19824128.

The previous prime is 42126533. The next prime is 42126563. The reversal of 42126544 is 44562124.

It can be written as a sum of positive squares in 2 ways, for example, as 31809600 + 10316944 = 5640^2 + 3212^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77167 + ... + 77710.

Almost surely, 2^42126544 is an apocalyptic number.

It is an amenable number.

42126544 is an abundant number, since it is smaller than the sum of its proper divisors (44295380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42126544 is a wasteful number, since it uses less digits than its factorization.

42126544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154902 (or 154896 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 42126544 is about 6490.4964370994. The cubic root of 42126544 is about 347.9514178889.

Adding to 42126544 its reverse (44562124), we get a palindrome (86688668).

The spelling of 42126544 in words is "forty-two million, one hundred twenty-six thousand, five hundred forty-four".