42125640 has 32 divisors (see below), whose sum is σ = 126377280. Its totient is φ = 11233472.

The previous prime is 42125639. The next prime is 42125651. The reversal of 42125640 is 4652124.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 42125640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175404 + ... + 175643.

It is an arithmetic number, because the mean of its divisors is an integer number (3949290).

Almost surely, 2^42125640 is an apocalyptic number.

42125640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42125640 is an abundant number, since it is smaller than the sum of its proper divisors (84251640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42125640 is a wasteful number, since it uses less digits than its factorization.

42125640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351061 (or 351057 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 42125640 is about 6490.4267964441. The cubic root of 42125640 is about 347.9489289567.

Adding to 42125640 its reverse (4652124), we get a palindrome (46777764).

The spelling of 42125640 in words is "forty-two million, one hundred twenty-five thousand, six hundred forty".