140502431 has 8 divisors (see below), whose sum is σ = 145924560. Its totient is φ = 135165888.

The previous prime is 140502409. The next prime is 140502491. The reversal of 140502431 is 134205041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140502431 is a prime.

It is a super-2 number, since 2×140502431² = 39481866233819522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140502491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18041 + ... + 24626.

It is an arithmetic number, because the mean of its divisors is an integer number (18240570).

Almost surely, 2^140502431 is an apocalyptic number.

140502431 is a deficient number, since it is larger than the sum of its proper divisors (5422129).

140502431 is an equidigital number, since it uses as much as digits as its factorization.

140502431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42793.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 140502431 is about 11853.3721362320. The cubic root of 140502431 is about 519.8698281169.

Adding to 140502431 its reverse (134205041), we get a palindrome (274707472).

The spelling of 140502431 in words is "one hundred forty million, five hundred two thousand, four hundred thirty-one".