140044421 has 16 divisors (see below), whose sum is σ = 164567040. Its totient is φ = 117799920.

The previous prime is 140044381. The next prime is 140044423. The reversal of 140044421 is 124440041.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140044421 is a prime.

It is a super-2 number, since 2×140044421² = 39224879706450482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140044393 and 140044402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140044423) 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, 1196 + ... + 16778.

It is an arithmetic number, because the mean of its divisors is an integer number (10285440).

Almost surely, 2^140044421 is an apocalyptic number.

140044421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140044421 is a deficient number, since it is larger than the sum of its proper divisors (24522619).

140044421 is a wasteful number, since it uses less digits than its factorization.

140044421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 140044421 is about 11834.0365471803. The cubic root of 140044421 is about 519.3043224207.

Adding to 140044421 its reverse (124440041), we get a palindrome (264484462).

The spelling of 140044421 in words is "one hundred forty million, forty-four thousand, four hundred twenty-one".