40242242 has 4 divisors (see below), whose sum is σ = 60363366. Its totient is φ = 20121120.

The previous prime is 40242239. The next prime is 40242259. The reversal of 40242242 is 24224204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 312481 = 6319^2 + 559^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060559 + ... + 10060562.

Almost surely, 2^40242242 is an apocalyptic number.

40242242 is a deficient number, since it is larger than the sum of its proper divisors (20121124).

40242242 is a wasteful number, since it uses less digits than its factorization.

40242242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20121123.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 40242242 is about 6343.6773247069. The cubic root of 40242242 is about 342.6841803356.

Adding to 40242242 its reverse (24224204), we get a palindrome (64466446).

The spelling of 40242242 in words is "forty million, two hundred forty-two thousand, two hundred forty-two".