42525240 has 32 divisors (see below), whose sum is σ = 127576080. Its totient is φ = 11340032.

The previous prime is 42525227. The next prime is 42525251. The reversal of 42525240 is 4252524.

It is a happy number.

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 42525240.

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, 177069 + ... + 177308.

Almost surely, 2^42525240 is an apocalyptic number.

42525240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42525240 is an abundant number, since it is smaller than the sum of its proper divisors (85050840).

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

42525240 is a wasteful number, since it uses less digits than its factorization.

42525240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354391 (or 354387 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 42525240 is about 6521.1379375075. The cubic root of 42525240 is about 349.0456723560.

Adding to 42525240 its reverse (4252524), we get a palindrome (46777764).

The spelling of 42525240 in words is "forty-two million, five hundred twenty-five thousand, two hundred forty".