140543421 has 8 divisors (see below), whose sum is σ = 190188384. Its totient is φ = 92297040.

The previous prime is 140543413. The next prime is 140543453. The reversal of 140543421 is 124345041.

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

It is not a de Polignac number, because 140543421 - 2³ = 140543413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140543391 and 140543400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140543021) 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, 349410 + ... + 349811.

It is an arithmetic number, because the mean of its divisors is an integer number (23773548).

Almost surely, 2^140543421 is an apocalyptic number.

It is an amenable number.

140543421 is a deficient number, since it is larger than the sum of its proper divisors (49644963).

140543421 is an equidigital number, since it uses as much as digits as its factorization.

140543421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699291.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140543421 is about 11855.1010539767. The cubic root of 140543421 is about 519.9203785882.

Adding to 140543421 its reverse (124345041), we get a palindrome (264888462).

The spelling of 140543421 in words is "one hundred forty million, five hundred forty-three thousand, four hundred twenty-one".