140665402 has 4 divisors (see below), whose sum is σ = 210998106. Its totient is φ = 70332700.

The previous prime is 140665373. The next prime is 140665403. The reversal of 140665402 is 204566041.

140665402 is digitally balanced in base 3, 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 only one way, i.e., 127712601 + 12952801 = 11301^2 + 3599^2 .

It is not an unprimeable number, because it can be changed into a prime (140665403) 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 as a sum of consecutive naturals, namely, 35166349 + ... + 35166352.

Almost surely, 2^140665402 is an apocalyptic number.

140665402 is a deficient number, since it is larger than the sum of its proper divisors (70332704).

140665402 is an equidigital number, since it uses as much as digits as its factorization.

140665402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70332703.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 140665402 is about 11860.2446011876. The cubic root of 140665402 is about 520.0707522072.

The spelling of 140665402 in words is "one hundred forty million, six hundred sixty-five thousand, four hundred two".