140644145 has 16 divisors (see below), whose sum is σ = 183063888. Its totient is φ = 103311360.

The previous prime is 140644129. The next prime is 140644151. The reversal of 140644145 is 541446041.

It can be written as a sum of positive squares in 8 ways, for example, as 33500944 + 107143201 = 5788^2 + 10351^2 .

It is not a de Polignac number, because 140644145 - 2⁴ = 140644129 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 16694 + ... + 23663.

It is an arithmetic number, because the mean of its divisors is an integer number (11441493).

Almost surely, 2^140644145 is an apocalyptic number.

It is an amenable number.

140644145 is a deficient number, since it is larger than the sum of its proper divisors (42419743).

140644145 is a wasteful number, since it uses less digits than its factorization.

140644145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40420.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 140644145 is about 11859.3484222364. The cubic root of 140644145 is about 520.0445536283.

The spelling of 140644145 in words is "one hundred forty million, six hundred forty-four thousand, one hundred forty-five".