140105430 has 128 divisors (see below), whose sum is σ = 406425600. Its totient is φ = 34214400.

The previous prime is 140105401. The next prime is 140105437. The reversal of 140105430 is 34501041.

It is a happy number.

140105430 is a nontrivial binomial coefficient, being equal to C(16740, 2).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140105437) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158590 + ... + 159470.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^140105430 is an apocalyptic number.

140105430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140105430 is the 16739-th triangular number and also the 8370-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140105430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203212800).

140105430 is an abundant number, since it is smaller than the sum of its proper divisors (266320170).

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

140105430 is a wasteful number, since it uses less digits than its factorization.

140105430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 140105430 is about 11836.6139583920. The cubic root of 140105430 is about 519.3797214444.

Adding to 140105430 its reverse (34501041), we get a palindrome (174606471).

It can be divided in two parts, 140 and 105430, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 140105430 in words is "one hundred forty million, one hundred five thousand, four hundred thirty".