140121829 has 4 divisors (see below), whose sum is σ = 144641920. Its totient is φ = 135601740.

The previous prime is 140121799. The next prime is 140121841. The reversal of 140121829 is 928121041.

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 140121829 - 2¹³ = 140113637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140121797 and 140121806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2259999 + ... + 2260060.

It is an arithmetic number, because the mean of its divisors is an integer number (36160480).

Almost surely, 2^140121829 is an apocalyptic number.

It is an amenable number.

140121829 is a deficient number, since it is larger than the sum of its proper divisors (4520091).

140121829 is an equidigital number, since it uses as much as digits as its factorization.

140121829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520090.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 140121829 is about 11837.3066615679. The cubic root of 140121829 is about 519.3999846984.

The spelling of 140121829 in words is "one hundred forty million, one hundred twenty-one thousand, eight hundred twenty-nine".