42061556 has 12 divisors (see below), whose sum is σ = 74077668. Its totient is φ = 20896512.

The previous prime is 42061529. The next prime is 42061559. The reversal of 42061556 is 65516024.

42061556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 36844900 = 2284^2 + 6070^2 .

It is a super-2 number, since 2×42061556² = 3538348986282272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42061559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32861 + ... + 34116.

It is an arithmetic number, because the mean of its divisors is an integer number (6173139).

Almost surely, 2^42061556 is an apocalyptic number.

It is an amenable number.

42061556 is a deficient number, since it is larger than the sum of its proper divisors (32016112).

42061556 is a wasteful number, since it uses less digits than its factorization.

42061556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67138 (or 67136 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 42061556 is about 6485.4881080764. The cubic root of 42061556 is about 347.7723992888.

The spelling of 42061556 in words is "forty-two million, sixty-one thousand, five hundred fifty-six".