140870781 has 12 divisors (see below), whose sum is σ = 203699808. Its totient is φ = 93812424.

The previous prime is 140870771. The next prime is 140870831. The reversal of 140870781 is 187078041.

It is not a de Polignac number, because 140870781 - 2⁵ = 140870749 is a prime.

It is a super-2 number, since 2×140870781² = 39689153879099922, 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 (140870771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 886 + ... + 16808.

It is an arithmetic number, because the mean of its divisors is an integer number (16974984).

Almost surely, 2^140870781 is an apocalyptic number.

It is an amenable number.

140870781 is a deficient number, since it is larger than the sum of its proper divisors (62829027).

140870781 is a wasteful number, since it uses less digits than its factorization.

140870781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16912 (or 16909 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 140870781 is about 11868.8997383919. The cubic root of 140870781 is about 520.3237394807.

The spelling of 140870781 in words is "one hundred forty million, eight hundred seventy thousand, seven hundred eighty-one".