42125105 has 16 divisors (see below), whose sum is σ = 55344384. Its totient is φ = 30526080.

The previous prime is 42125087. The next prime is 42125107. The reversal of 42125105 is 50152124.

It is not a de Polignac number, because 42125105 - 2¹⁴ = 42108721 is a prime.

It is a super-2 number, since 2×42125105² = 3549048942522050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42125107) 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 15 ways as a sum of consecutive naturals, for example, 15992 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (3459024).

Almost surely, 2^42125105 is an apocalyptic number.

It is an amenable number.

42125105 is a deficient number, since it is larger than the sum of its proper divisors (13219279).

42125105 is a wasteful number, since it uses less digits than its factorization.

42125105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42125105 is about 6490.3855817663. The cubic root of 42125105 is about 347.9474559546.

Adding to 42125105 its reverse (50152124), we get a palindrome (92277229).

The spelling of 42125105 in words is "forty-two million, one hundred twenty-five thousand, one hundred five".