140134431 has 4 divisors (see below), whose sum is σ = 186845912. Its totient is φ = 93422952.

The previous prime is 140134427. The next prime is 140134439. The reversal of 140134431 is 134431041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134431041 = 3 ⋅44810347.

It is not a de Polignac number, because 140134431 - 2² = 140134427 is a prime.

It is a super-2 number, since 2×140134431² = 39275317503387522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140134398 and 140134407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140134439) 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, 23355736 + ... + 23355741.

It is an arithmetic number, because the mean of its divisors is an integer number (46711478).

Almost surely, 2^140134431 is an apocalyptic number.

140134431 is a deficient number, since it is larger than the sum of its proper divisors (46711481).

140134431 is an equidigital number, since it uses as much as digits as its factorization.

140134431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46711480.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 140134431 is about 11837.8389497408. The cubic root of 140134431 is about 519.4155551546.

Adding to 140134431 its reverse (134431041), we get a palindrome (274565472).

The spelling of 140134431 in words is "one hundred forty million, one hundred thirty-four thousand, four hundred thirty-one".