140131646 has 16 divisors (see below), whose sum is σ = 222887376. Its totient is φ = 65847936.

The previous prime is 140131643. The next prime is 140131681. The reversal of 140131646 is 646131041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140131643) 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, 24140 + ... + 29376.

It is an arithmetic number, because the mean of its divisors is an integer number (13930461).

Almost surely, 2^140131646 is an apocalyptic number.

140131646 is a deficient number, since it is larger than the sum of its proper divisors (82755730).

140131646 is a wasteful number, since it uses less digits than its factorization.

140131646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 140131646 is about 11837.7213178888. The cubic root of 140131646 is about 519.4121142160.

Adding to 140131646 its reverse (646131041), we get a palindrome (786262687).

The spelling of 140131646 in words is "one hundred forty million, one hundred thirty-one thousand, six hundred forty-six".