140442131 has 4 divisors (see below), whose sum is σ = 140661192. Its totient is φ = 140223072.

The previous prime is 140442079. The next prime is 140442149. The reversal of 140442131 is 131244041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131244041 = 43 ⋅3052187.

It is a cyclic number.

It is not a de Polignac number, because 140442131 - 2¹⁰ = 140441107 is a prime.

It is a super-2 number, since 2×140442131² = 39447984319642322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140442931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108566 + ... + 109851.

It is an arithmetic number, because the mean of its divisors is an integer number (35165298).

Almost surely, 2^140442131 is an apocalyptic number.

140442131 is a deficient number, since it is larger than the sum of its proper divisors (219061).

140442131 is an equidigital number, since it uses as much as digits as its factorization.

140442131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219060.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 140442131 is about 11850.8282832889. The cubic root of 140442131 is about 519.7954459251.

Adding to 140442131 its reverse (131244041), we get a palindrome (271686172).

The spelling of 140442131 in words is "one hundred forty million, four hundred forty-two thousand, one hundred thirty-one".