140291285 has 4 divisors (see below), whose sum is σ = 168349548. Its totient is φ = 112233024.

The previous prime is 140291279. The next prime is 140291297. The reversal of 140291285 is 582192041.

140291285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74891716 + 65399569 = 8654^2 + 8087^2 .

It is a cyclic number.

It is not a de Polignac number, because 140291285 - 2¹⁶ = 140225749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14029124 + ... + 14029133.

It is an arithmetic number, because the mean of its divisors is an integer number (42087387).

Almost surely, 2^140291285 is an apocalyptic number.

It is an amenable number.

140291285 is a deficient number, since it is larger than the sum of its proper divisors (28058263).

140291285 is an equidigital number, since it uses as much as digits as its factorization.

140291285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28058262.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 140291285 is about 11844.4622081376. The cubic root of 140291285 is about 519.6092787293.

The spelling of 140291285 in words is "one hundred forty million, two hundred ninety-one thousand, two hundred eighty-five".