140445427 has 4 divisors (see below), whose sum is σ = 141893416. Its totient is φ = 138997440.

The previous prime is 140445391. The next prime is 140445433. The reversal of 140445427 is 724544041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724544041 = 13 ⋅55734157.

It is a cyclic number.

It is not a de Polignac number, because 140445427 - 2⁷ = 140445299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140445457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723849 + ... + 724042.

It is an arithmetic number, because the mean of its divisors is an integer number (35473354).

Almost surely, 2^140445427 is an apocalyptic number.

140445427 is a deficient number, since it is larger than the sum of its proper divisors (1447989).

140445427 is an equidigital number, since it uses as much as digits as its factorization.

140445427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447988.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 140445427 is about 11850.9673444829. The cubic root of 140445427 is about 519.7995122082.

Adding to 140445427 its reverse (724544041), we get a palindrome (864989468).

The spelling of 140445427 in words is "one hundred forty million, four hundred forty-five thousand, four hundred twenty-seven".