140121818 has 8 divisors (see below), whose sum is σ = 212223648. Its totient is φ = 69380604.

The previous prime is 140121799. The next prime is 140121841. The reversal of 140121818 is 818121041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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, 339896 + ... + 340307.

It is an arithmetic number, because the mean of its divisors is an integer number (26527956).

Almost surely, 2^140121818 is an apocalyptic number.

140121818 is a deficient number, since it is larger than the sum of its proper divisors (72101830).

140121818 is a wasteful number, since it uses less digits than its factorization.

140121818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680308.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 140121818 is about 11837.3061969352. The cubic root of 140121818 is about 519.3999711069.

Adding to 140121818 its reverse (818121041), we get a palindrome (958242859).

The spelling of 140121818 in words is "one hundred forty million, one hundred twenty-one thousand, eight hundred eighteen".