140445001 has 2 divisors, whose sum is σ = 140445002. Its totient is φ = 140445000.

The previous prime is 140444989. The next prime is 140445073. The reversal of 140445001 is 100544041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 68873401 = 8460^2 + 8299^2 .

It is a cyclic number.

It is not a de Polignac number, because 140445001 - 2¹⁹ = 139920713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140445001.

It is not a weakly prime, because it can be changed into another prime (140445091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70222500 + 70222501.

It is an arithmetic number, because the mean of its divisors is an integer number (70222501).

Almost surely, 2^140445001 is an apocalyptic number.

It is an amenable number.

140445001 is a deficient number, since it is larger than the sum of its proper divisors (1).

140445001 is an equidigital number, since it uses as much as digits as its factorization.

140445001 is an evil number, because the sum of its binary digits is even.

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

The square root of 140445001 is about 11850.9493712529. The cubic root of 140445001 is about 519.7989866546.

Adding to 140445001 its reverse (100544041), we get a palindrome (240989042).

The spelling of 140445001 in words is "one hundred forty million, four hundred forty-five thousand, one".