42252240 has 40 divisors (see below), whose sum is σ = 130982688. Its totient is φ = 11267200.

The previous prime is 42252227. The next prime is 42252269. The reversal of 42252240 is 4225224.

It is a tau number, because it is divible by the number of its divisors (40).

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, 87786 + ... + 88265.

Almost surely, 2^42252240 is an apocalyptic number.

42252240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42252240 is an abundant number, since it is smaller than the sum of its proper divisors (88730448).

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

42252240 is a wasteful number, since it uses less digits than its factorization.

42252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176067 (or 176061 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42252240 is about 6500.1723054085. The cubic root of 42252240 is about 348.2971434870.

Adding to 42252240 its reverse (4225224), we get a palindrome (46477464).

The spelling of 42252240 in words is "forty-two million, two hundred fifty-two thousand, two hundred forty".