140121028 has 12 divisors (see below), whose sum is σ = 245536060. Its totient is φ = 69967872.

The previous prime is 140120999. The next prime is 140121049. The reversal of 140121028 is 820121041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82846404 + 57274624 = 9102^2 + 7568^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140120996 and 140121014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19701 + ... + 25852.

Almost surely, 2^140121028 is an apocalyptic number.

It is an amenable number.

140121028 is a deficient number, since it is larger than the sum of its proper divisors (105415032).

140121028 is a wasteful number, since it uses less digits than its factorization.

140121028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46326 (or 46324 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 140121028 is about 11837.2728278096. The cubic root of 140121028 is about 519.3989949878.

Adding to 140121028 its reverse (820121041), we get a palindrome (960242069).

The spelling of 140121028 in words is "one hundred forty million, one hundred twenty-one thousand, twenty-eight".