40240142 has 4 divisors (see below), whose sum is σ = 60360216. Its totient is φ = 20120070.

The previous prime is 40240129. The next prime is 40240163. The reversal of 40240142 is 24104204.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40240142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060034 + ... + 10060037.

It is an arithmetic number, because the mean of its divisors is an integer number (15090054).

Almost surely, 2^40240142 is an apocalyptic number.

40240142 is a deficient number, since it is larger than the sum of its proper divisors (20120074).

40240142 is a wasteful number, since it uses less digits than its factorization.

40240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20120073.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40240142 is about 6343.5118034098. The cubic root of 40240142 is about 342.6782193581.

Adding to 40240142 its reverse (24104204), we get a palindrome (64344346).

The spelling of 40240142 in words is "forty million, two hundred forty thousand, one hundred forty-two".