140591785 has 8 divisors (see below), whose sum is σ = 178634376. Its totient is φ = 105857280.

The previous prime is 140591779. The next prime is 140591821. The reversal of 140591785 is 587195041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 79423744 + 61168041 = 8912^2 + 7821^2 .

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

It is not a de Polignac number, because 140591785 - 2³ = 140591777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826926 + ... + 827095.

It is an arithmetic number, because the mean of its divisors is an integer number (22329297).

Almost surely, 2^140591785 is an apocalyptic number.

It is an amenable number.

140591785 is a deficient number, since it is larger than the sum of its proper divisors (38042591).

140591785 is a wasteful number, since it uses less digits than its factorization.

140591785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654043.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 140591785 is about 11857.1406755592. The cubic root of 140591785 is about 519.9800103262.

It can be divided in two parts, 140591 and 785, that added together give a square (141376 = 376²).

The spelling of 140591785 in words is "one hundred forty million, five hundred ninety-one thousand, seven hundred eighty-five".