140242849 has 4 divisors (see below), whose sum is σ = 140365636. Its totient is φ = 140120064.

The previous prime is 140242847. The next prime is 140242873. The reversal of 140242849 is 948242041.

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 127690000 + 12552849 = 11300^2 + 3543^2 .

It is a cyclic number.

It is not a de Polignac number, because 140242849 - 2¹ = 140242847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140242841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59664 + ... + 61969.

It is an arithmetic number, because the mean of its divisors is an integer number (35091409).

Almost surely, 2^140242849 is an apocalyptic number.

It is an amenable number.

140242849 is a deficient number, since it is larger than the sum of its proper divisors (122787).

140242849 is a wasteful number, since it uses less digits than its factorization.

140242849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122786.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 140242849 is about 11842.4173630218. The cubic root of 140242849 is about 519.5494729426.

The spelling of 140242849 in words is "one hundred forty million, two hundred forty-two thousand, eight hundred forty-nine".