140121040 has 40 divisors (see below), whose sum is σ = 337020840. Its totient is φ = 54114816.

The previous prime is 140120999. The next prime is 140121049. The reversal of 140121040 is 40121041.

It can be written as a sum of positive squares in 4 ways, for example, as 4910656 + 135210384 = 2216^2 + 11628^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 140121040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121049) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 27879 + ... + 32518.

It is an arithmetic number, because the mean of its divisors is an integer number (8425521).

Almost surely, 2^140121040 is an apocalyptic number.

140121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140121040 is an abundant number, since it is smaller than the sum of its proper divisors (196899800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140121040 is a wasteful number, since it uses less digits than its factorization.

140121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60439 (or 60433 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 140121040 is about 11837.2733346831. The cubic root of 140121040 is about 519.3990098150.

Adding to 140121040 its reverse (40121041), we get a palindrome (180242081).

Subtracting from 140121040 its reverse (40121041), we obtain a palindrome (99999999).

The spelling of 140121040 in words is "one hundred forty million, one hundred twenty-one thousand, forty".