140531146 has 32 divisors (see below), whose sum is σ = 255795840. Its totient is φ = 56526336.

The previous prime is 140531141. The next prime is 140531147. The reversal of 140531146 is 641135041.

It is a self number, because there is not a number n which added to its sum of digits gives 140531146.

It is not an unprimeable number, because it can be changed into a prime (140531141) 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, 123910 + ... + 125038.

It is an arithmetic number, because the mean of its divisors is an integer number (7993620).

Almost surely, 2^140531146 is an apocalyptic number.

140531146 is a deficient number, since it is larger than the sum of its proper divisors (115264694).

140531146 is a wasteful number, since it uses less digits than its factorization.

140531146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 140531146 is about 11854.5833330404. The cubic root of 140531146 is about 519.9052416092.

Adding to 140531146 its reverse (641135041), we get a palindrome (781666187).

The spelling of 140531146 in words is "one hundred forty million, five hundred thirty-one thousand, one hundred forty-six".