140240266 has 4 divisors (see below), whose sum is σ = 210360402. Its totient is φ = 70120132.

The previous prime is 140240161. The next prime is 140240267. The reversal of 140240266 is 662042041.

140240266 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, and also an emirpimes, since its reverse is a distinct semiprime: 662042041 = 79 ⋅8380279.

It can be written as a sum of positive squares in only one way, i.e., 128482225 + 11758041 = 11335^2 + 3429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140240266.

It is not an unprimeable number, because it can be changed into a prime (140240267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35060065 + ... + 35060068.

Almost surely, 2^140240266 is an apocalyptic number.

140240266 is a deficient number, since it is larger than the sum of its proper divisors (70120136).

140240266 is an equidigital number, since it uses as much as digits as its factorization.

140240266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70120135.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 140240266 is about 11842.3083053938. The cubic root of 140240266 is about 519.5462832267.

The spelling of 140240266 in words is "one hundred forty million, two hundred forty thousand, two hundred sixty-six".