140429681 has 8 divisors (see below), whose sum is σ = 160750464. Its totient is φ = 120173760.

The previous prime is 140429657. The next prime is 140429699. The reversal of 140429681 is 186924041.

It is a happy number.

140429681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 140429681 - 2¹⁰ = 140428657 is a prime.

It is a super-2 number, since 2×140429681² = 39440990611523522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140479681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11480 + ... + 20313.

It is an arithmetic number, because the mean of its divisors is an integer number (20093808).

Almost surely, 2^140429681 is an apocalyptic number.

It is an amenable number.

140429681 is a deficient number, since it is larger than the sum of its proper divisors (20320783).

140429681 is an equidigital number, since it uses as much as digits as its factorization.

140429681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32431.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 140429681 is about 11850.3029919070. The cubic root of 140429681 is about 519.7800857563.

The spelling of 140429681 in words is "one hundred forty million, four hundred twenty-nine thousand, six hundred eighty-one".