140003781 has 8 divisors (see below), whose sum is σ = 192693504. Its totient is φ = 90324960.

The previous prime is 140003777. The next prime is 140003791. The reversal of 140003781 is 187300041.

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

It is not a de Polignac number, because 140003781 - 2² = 140003777 is a prime.

It is a super-2 number, since 2×140003781² = 39202117388591922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140003711) 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 7 ways as a sum of consecutive naturals, for example, 752616 + ... + 752801.

It is an arithmetic number, because the mean of its divisors is an integer number (24086688).

Almost surely, 2^140003781 is an apocalyptic number.

It is an amenable number.

140003781 is a deficient number, since it is larger than the sum of its proper divisors (52689723).

140003781 is a wasteful number, since it uses less digits than its factorization.

140003781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505451.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 140003781 is about 11832.3193415323. The cubic root of 140003781 is about 519.2540846240.

The spelling of 140003781 in words is "one hundred forty million, three thousand, seven hundred eighty-one".