140121740 has 24 divisors (see below), whose sum is σ = 321006672. Its totient is φ = 50953280.

The previous prime is 140121739. The next prime is 140121757. The reversal of 140121740 is 47121041.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 318239 + ... + 318678.

It is an arithmetic number, because the mean of its divisors is an integer number (13375278).

Almost surely, 2^140121740 is an apocalyptic number.

140121740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140121740 is an abundant number, since it is smaller than the sum of its proper divisors (180884932).

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

140121740 is a wasteful number, since it uses less digits than its factorization.

140121740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636937 (or 636935 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 140121740 is about 11837.3029022662. The cubic root of 140121740 is about 519.3998747308.

Adding to 140121740 its reverse (47121041), we get a palindrome (187242781).

The spelling of 140121740 in words is "one hundred forty million, one hundred twenty-one thousand, seven hundred forty".