40131242 has 4 divisors (see below), whose sum is σ = 60196866. Its totient is φ = 20065620.

The previous prime is 40131233. The next prime is 40131253. The reversal of 40131242 is 24213104.

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., 31125241 + 9006001 = 5579^2 + 3001^2 .

It is a super-2 number, since 2×40131242² = 3221033168925128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40131242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10032809 + ... + 10032812.

Almost surely, 2^40131242 is an apocalyptic number.

40131242 is a deficient number, since it is larger than the sum of its proper divisors (20065624).

40131242 is a wasteful number, since it uses less digits than its factorization.

40131242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20065623.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40131242 is about 6334.9224146788. The cubic root of 40131242 is about 342.3688154428.

Adding to 40131242 its reverse (24213104), we get a palindrome (64344346).

The spelling of 40131242 in words is "forty million, one hundred thirty-one thousand, two hundred forty-two".