140142121 has 4 divisors (see below), whose sum is σ = 160162432. Its totient is φ = 120121812.

The previous prime is 140142113. The next prime is 140142127. The reversal of 140142121 is 121241041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140142121 - 2³ = 140142113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140142095 and 140142104.

It is not an unprimeable number, because it can be changed into a prime (140142127) 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, 10010145 + ... + 10010158.

It is an arithmetic number, because the mean of its divisors is an integer number (40040608).

Almost surely, 2^140142121 is an apocalyptic number.

It is an amenable number.

140142121 is a deficient number, since it is larger than the sum of its proper divisors (20020311).

140142121 is an equidigital number, since it uses as much as digits as its factorization.

140142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020310.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 140142121 is about 11838.1637511905. The cubic root of 140142121 is about 519.4250561091.

Adding to 140142121 its reverse (121241041), we get a palindrome (261383162).

The spelling of 140142121 in words is "one hundred forty million, one hundred forty-two thousand, one hundred twenty-one".