140025409 has 2 divisors, whose sum is σ = 140025410. Its totient is φ = 140025408.

The previous prime is 140025397. The next prime is 140025469. The reversal of 140025409 is 904520041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133471809 + 6553600 = 11553^2 + 2560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140025409 is a prime.

It is not a weakly prime, because it can be changed into another prime (140025469) 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, 70012704 + 70012705.

It is an arithmetic number, because the mean of its divisors is an integer number (70012705).

Almost surely, 2^140025409 is an apocalyptic number.

It is an amenable number.

140025409 is a deficient number, since it is larger than the sum of its proper divisors (1).

140025409 is an equidigital number, since it uses as much as digits as its factorization.

140025409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 140025409 is about 11833.2332437082. The cubic root of 140025409 is about 519.2808216379.

The spelling of 140025409 in words is "one hundred forty million, twenty-five thousand, four hundred nine".