140121443 has 8 divisors (see below), whose sum is σ = 174696960. Its totient is φ = 109185480.

The previous prime is 140121439. The next prime is 140121473. The reversal of 140121443 is 344121041.

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

It is a cyclic number.

It is not a de Polignac number, because 140121443 - 2² = 140121439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140121473) 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, 909803 + ... + 909956.

It is an arithmetic number, because the mean of its divisors is an integer number (21837120).

Almost surely, 2^140121443 is an apocalyptic number.

140121443 is a deficient number, since it is larger than the sum of its proper divisors (34575517).

140121443 is a wasteful number, since it uses less digits than its factorization.

140121443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819777.

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

The square root of 140121443 is about 11837.2903571721. The cubic root of 140121443 is about 519.3995077597.

Adding to 140121443 its reverse (344121041), we get a palindrome (484242484).

The spelling of 140121443 in words is "one hundred forty million, one hundred twenty-one thousand, four hundred forty-three".