42145125 has 64 divisors (see below), whose sum is σ = 81139968. Its totient is φ = 19200000.

The previous prime is 42145099. The next prime is 42145127. The reversal of 42145125 is 52154124.

It is not a de Polignac number, because 42145125 - 2¹¹ = 42143077 is a prime.

It is a super-2 number, since 2×42145125² = 3552423122531250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42145095 and 42145104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145127) 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 63 ways as a sum of consecutive naturals, for example, 69825 + ... + 70425.

It is an arithmetic number, because the mean of its divisors is an integer number (1267812).

Almost surely, 2^42145125 is an apocalyptic number.

It is an amenable number.

42145125 is a deficient number, since it is larger than the sum of its proper divisors (38994843).

42145125 is a wasteful number, since it uses less digits than its factorization.

42145125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 637 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 42145125 is about 6491.9276798190. The cubic root of 42145125 is about 348.0025680217.

Adding to 42145125 its reverse (52154124), we get a palindrome (94299249).

It can be divided in two parts, 4214 and 5125, that added together give a palindrome (9339).

The spelling of 42145125 in words is "forty-two million, one hundred forty-five thousand, one hundred twenty-five".