140121420 has 48 divisors (see below), whose sum is σ = 394426368. Its totient is φ = 37167040.

The previous prime is 140121407. The next prime is 140121427. The reversal of 140121420 is 24121041.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 140121420.

It is not an unprimeable number, because it can be changed into a prime (140121427) 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 15 ways as a sum of consecutive naturals, for example, 5347 + ... + 17573.

It is an arithmetic number, because the mean of its divisors is an integer number (8217216).

Almost surely, 2^140121420 is an apocalyptic number.

140121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140121420 is an abundant number, since it is smaller than the sum of its proper divisors (254304948).

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

140121420 is a wasteful number, since it uses less digits than its factorization.

140121420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 140121420 is about 11837.2893856660. The cubic root of 140121420 is about 519.3994793411.

Adding to 140121420 its reverse (24121041), we get a palindrome (164242461).

The spelling of 140121420 in words is "one hundred forty million, one hundred twenty-one thousand, four hundred twenty".