140400145 has 4 divisors (see below), whose sum is σ = 168480180. Its totient is φ = 112320112.

The previous prime is 140400133. The next prime is 140400173. The reversal of 140400145 is 541004041.

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 38551681 + 101848464 = 6209^2 + 10092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140400145 is a prime.

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, 14040010 + ... + 14040019.

It is an arithmetic number, because the mean of its divisors is an integer number (42120045).

Almost surely, 2^140400145 is an apocalyptic number.

It is an amenable number.

140400145 is a deficient number, since it is larger than the sum of its proper divisors (28080035).

140400145 is an equidigital number, since it uses as much as digits as its factorization.

140400145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28080034.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 140400145 is about 11849.0567135110. The cubic root of 140400145 is about 519.7436421285.

Adding to 140400145 its reverse (541004041), we get a palindrome (681404186).

The spelling of 140400145 in words is "one hundred forty million, four hundred thousand, one hundred forty-five".