140401643 has 8 divisors (see below), whose sum is σ = 147266112. Its totient is φ = 133698816.

The previous prime is 140401571. The next prime is 140401661. The reversal of 140401643 is 346104041.

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

It is a cyclic number.

It is not a de Polignac number, because 140401643 - 2¹⁶ = 140336107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140401663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38630 + ... + 42107.

It is an arithmetic number, because the mean of its divisors is an integer number (18408264).

Almost surely, 2^140401643 is an apocalyptic number.

140401643 is a deficient number, since it is larger than the sum of its proper divisors (6864469).

140401643 is an equidigital number, since it uses as much as digits as its factorization.

140401643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80821.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140401643 is about 11849.1199251252. The cubic root of 140401643 is about 519.7454905910.

Adding to 140401643 its reverse (346104041), we get a palindrome (486505684).

The spelling of 140401643 in words is "one hundred forty million, four hundred one thousand, six hundred forty-three".