4138247 has 2 divisors, whose sum is σ = 4138248. Its totient is φ = 4138246.

The previous prime is 4138243. The next prime is 4138249. The reversal of 4138247 is 7428314.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4138247 - 2² = 4138243 is a prime.

Together with 4138249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069123 + 2069124.

It is an arithmetic number, because the mean of its divisors is an integer number (2069124).

Almost surely, 2^4138247 is an apocalyptic number.

4138247 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138247 is an equidigital number, since it uses as much as digits as its factorization.

4138247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 4138247 is about 2034.2681730785. The cubic root of 4138247 is about 160.5482106573.

The spelling of 4138247 in words is "four million, one hundred thirty-eight thousand, two hundred forty-seven".