140121353 has 4 divisors (see below), whose sum is σ = 141406980. Its totient is φ = 138835728.

The previous prime is 140121349. The next prime is 140121407. The reversal of 140121353 is 353121041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110397049 + 29724304 = 10507^2 + 5452^2 .

It is a cyclic number.

It is not a de Polignac number, because 140121353 - 2² = 140121349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140123353) 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, 642650 + ... + 642867.

It is an arithmetic number, because the mean of its divisors is an integer number (35351745).

Almost surely, 2^140121353 is an apocalyptic number.

It is an amenable number.

140121353 is a deficient number, since it is larger than the sum of its proper divisors (1285627).

140121353 is a wasteful number, since it uses less digits than its factorization.

140121353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285626.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 140121353 is about 11837.2865556258. The cubic root of 140121353 is about 519.3993965563.

Adding to 140121353 its reverse (353121041), we get a palindrome (493242394).

The spelling of 140121353 in words is "one hundred forty million, one hundred twenty-one thousand, three hundred fifty-three".