140643534 has 8 divisors (see below), whose sum is σ = 281287080. Its totient is φ = 46881176.

The previous prime is 140643521. The next prime is 140643541. The reversal of 140643534 is 435346041.

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

140643534 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11720289 + ... + 11720300.

It is an arithmetic number, because the mean of its divisors is an integer number (35160885).

Almost surely, 2^140643534 is an apocalyptic number.

140643534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140643534 is a wasteful number, since it uses less digits than its factorization.

140643534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23440594.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 140643534 is about 11859.3226619398. The cubic root of 140643534 is about 520.0438005511.

Adding to 140643534 its reverse (435346041), we get a palindrome (575989575).

The spelling of 140643534 in words is "one hundred forty million, six hundred forty-three thousand, five hundred thirty-four".