42126531 has 24 divisors (see below), whose sum is σ = 59367360. Its totient is φ = 26562144.

The previous prime is 42126521. The next prime is 42126533. The reversal of 42126531 is 13562124.

It is not a de Polignac number, because 42126531 - 2⁵ = 42126499 is a prime.

It is a super-2 number, since 2×42126531² = 3549289228187922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42126533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148716 + ... + 148998.

It is an arithmetic number, because the mean of its divisors is an integer number (2473640).

Almost surely, 2^42126531 is an apocalyptic number.

42126531 is a deficient number, since it is larger than the sum of its proper divisors (17240829).

42126531 is a wasteful number, since it uses less digits than its factorization.

42126531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 374 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 42126531 is about 6490.4954356351. The cubic root of 42126531 is about 347.9513820970.

Adding to 42126531 its reverse (13562124), we get a palindrome (55688655).

The spelling of 42126531 in words is "forty-two million, one hundred twenty-six thousand, five hundred thirty-one".