4172239 has 2 divisors, whose sum is σ = 4172240. Its totient is φ = 4172238.

The previous prime is 4172183. The next prime is 4172243. The reversal of 4172239 is 9322714.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4172239 - 2⁷ = 4172111 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4172279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2086119 + 2086120.

It is an arithmetic number, because the mean of its divisors is an integer number (2086120).

Almost surely, 2^4172239 is an apocalyptic number.

4172239 is a deficient number, since it is larger than the sum of its proper divisors (1).

4172239 is an equidigital number, since it uses as much as digits as its factorization.

4172239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 4172239 is about 2042.6059336054. The cubic root of 4172239 is about 160.9865991958.

The spelling of 4172239 in words is "four million, one hundred seventy-two thousand, two hundred thirty-nine".