42125240 has 32 divisors (see below), whose sum is σ = 97346880. Its totient is φ = 16394112.

The previous prime is 42125227. The next prime is 42125267. The reversal of 42125240 is 4252124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 12752 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (3042090).

Almost surely, 2^42125240 is an apocalyptic number.

42125240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42125240 is an abundant number, since it is smaller than the sum of its proper divisors (55221640).

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

42125240 is a wasteful number, since it uses less digits than its factorization.

42125240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28511 (or 28507 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42125240 is about 6490.3959817564. The cubic root of 42125240 is about 347.9478276479.

Adding to 42125240 its reverse (4252124), we get a palindrome (46377364).

The spelling of 42125240 in words is "forty-two million, one hundred twenty-five thousand, two hundred forty".