42561424 has 10 divisors (see below), whose sum is σ = 82462790. Its totient is φ = 21280704.

The previous prime is 42561413. The next prime is 42561503. The reversal of 42561424 is 42416524.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 3873024 = 6220^2 + 1968^2 .

It is a super-2 number, since 2×42561424² = 3622949625815552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42561392 and 42561401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330029 + ... + 1330060.

It is an arithmetic number, because the mean of its divisors is an integer number (8246279).

Almost surely, 2^42561424 is an apocalyptic number.

It is an amenable number.

42561424 is a deficient number, since it is larger than the sum of its proper divisors (39901366).

42561424 is a wasteful number, since it uses less digits than its factorization.

42561424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660097 (or 2660091 counting only the distinct ones).

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

The square root of 42561424 is about 6523.9117100096. The cubic root of 42561424 is about 349.1446432897.

Adding to 42561424 its reverse (42416524), we get a palindrome (84977948).

The spelling of 42561424 in words is "forty-two million, five hundred sixty-one thousand, four hundred twenty-four".