140375781 has 128 divisors (see below), whose sum is σ = 280985600. Its totient is φ = 67184640.

The previous prime is 140375771. The next prime is 140375789. The reversal of 140375781 is 187573041.

It is not a de Polignac number, because 140375781 - 2⁶ = 140375717 is a prime.

It is a super-2 number, since 2×140375781² = 39410719782719922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140375789) 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 127 ways as a sum of consecutive naturals, for example, 1447125 + ... + 1447221.

It is an arithmetic number, because the mean of its divisors is an integer number (2195200).

Almost surely, 2^140375781 is an apocalyptic number.

It is an amenable number.

140375781 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

140375781 is a wasteful number, since it uses less digits than its factorization.

140375781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 140375781 is about 11848.0285701884. The cubic root of 140375781 is about 519.7135762368.

The spelling of 140375781 in words is "one hundred forty million, three hundred seventy-five thousand, seven hundred eighty-one".