42426531 has 32 divisors (see below), whose sum is σ = 73786880. Its totient is φ = 23584608.

The previous prime is 42426523. The next prime is 42426533. The reversal of 42426531 is 13562424.

42426531 is a `hidden beast` number, since 4 + 2 + 4 + 2 + 653 + 1 = 666.

It is not a de Polignac number, because 42426531 - 2³ = 42426523 is a prime.

It is a super-2 number, since 2×42426531² = 3600021065387922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42426495 and 42426504.

It is not an unprimeable number, because it can be changed into a prime (42426533) 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 31 ways as a sum of consecutive naturals, for example, 3960 + ... + 10026.

It is an arithmetic number, because the mean of its divisors is an integer number (2305840).

Almost surely, 2^42426531 is an apocalyptic number.

42426531 is a deficient number, since it is larger than the sum of its proper divisors (31360349).

42426531 is a wasteful number, since it uses less digits than its factorization.

42426531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120 (or 6114 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 42426531 is about 6513.5651528176. The cubic root of 42426531 is about 348.7753964625.

Adding to 42426531 its reverse (13562424), we get a palindrome (55988955).

The spelling of 42426531 in words is "forty-two million, four hundred twenty-six thousand, five hundred thirty-one".