40001020142 has 4 divisors (see below), whose sum is σ = 60001530216. Its totient is φ = 20000510070.

The previous prime is 40001020141. The next prime is 40001020181. The reversal of 40001020142 is 24102010004.

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

It is a super-2 number, since 2×40001020142² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000255034 + ... + 10000255037.

It is an arithmetic number, because the mean of its divisors is an integer number (15000382554).

Almost surely, 2^40001020142 is an apocalyptic number.

40001020142 is a deficient number, since it is larger than the sum of its proper divisors (20000510074).

40001020142 is a wasteful number, since it uses less digits than its factorization.

40001020142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20000510073.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 40001020142 its reverse (24102010004), we get a palindrome (64103030146).

The spelling of 40001020142 in words is "forty billion, one million, twenty thousand, one hundred forty-two".