4240142209 has 2 divisors, whose sum is σ = 4240142210. Its totient is φ = 4240142208.

The previous prime is 4240142173. The next prime is 4240142213. The reversal of 4240142209 is 9022410424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3684125809 + 556016400 = 60697^2 + 23580^2 .

It is a cyclic number.

It is not a de Polignac number, because 4240142209 - 2¹⁵ = 4240109441 is a prime.

It is not a weakly prime, because it can be changed into another prime (4240122209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120071104 + 2120071105.

It is an arithmetic number, because the mean of its divisors is an integer number (2120071105).

Almost surely, 2^4240142209 is an apocalyptic number.

It is an amenable number.

4240142209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240142209 is an equidigital number, since it uses as much as digits as its factorization.

4240142209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 4240142209 is about 65116.3743539211. The cubic root of 4240142209 is about 1618.5525618500.

The spelling of 4240142209 in words is "four billion, two hundred forty million, one hundred forty-two thousand, two hundred nine".