40142252 has 6 divisors (see below), whose sum is σ = 70248948. Its totient is φ = 20071124.

The previous prime is 40142251. The next prime is 40142257. The reversal of 40142252 is 25224104.

It is a happy number.

It is a super-2 number, since 2×40142252² = 3222800791263008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40142251) 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 as a sum of consecutive naturals, namely, 5017778 + ... + 5017785.

It is an arithmetic number, because the mean of its divisors is an integer number (11708158).

Almost surely, 2^40142252 is an apocalyptic number.

It is an amenable number.

40142252 is a deficient number, since it is larger than the sum of its proper divisors (30106696).

40142252 is a wasteful number, since it uses less digits than its factorization.

40142252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035567 (or 10035565 counting only the distinct ones).

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

The square root of 40142252 is about 6335.7913475745. The cubic root of 40142252 is about 342.4001221904.

Adding to 40142252 its reverse (25224104), we get a palindrome (65366356).

The spelling of 40142252 in words is "forty million, one hundred forty-two thousand, two hundred fifty-two".