4278431 has 2 divisors, whose sum is σ = 4278432. Its totient is φ = 4278430.

The previous prime is 4278413. The next prime is 4278433. The reversal of 4278431 is 1348724.

Together with previous prime (4278413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4278431 - 2⁶ = 4278367 is a prime.

It is a super-2 number, since 2×4278431² = 36609943643522, which contains 22 as substring.

Together with 4278433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4278394 and 4278403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139215 + 2139216.

It is an arithmetic number, because the mean of its divisors is an integer number (2139216).

Almost surely, 2^4278431 is an apocalyptic number.

4278431 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278431 is an equidigital number, since it uses as much as digits as its factorization.

4278431 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 4278431 is about 2068.4368494107. The cubic root of 4278431 is about 162.3409852750.

The spelling of 4278431 in words is "four million, two hundred seventy-eight thousand, four hundred thirty-one".