4139427 has 4 divisors (see below), whose sum is σ = 5519240. Its totient is φ = 2759616.

The previous prime is 4139423. The next prime is 4139477. The reversal of 4139427 is 7249314.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4139427 - 2² = 4139423 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4139394 and 4139403.

It is not an unprimeable number, because it can be changed into a prime (4139423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689902 + ... + 689907.

It is an arithmetic number, because the mean of its divisors is an integer number (1379810).

Almost surely, 2^4139427 is an apocalyptic number.

4139427 is a deficient number, since it is larger than the sum of its proper divisors (1379813).

4139427 is a wasteful number, since it uses less digits than its factorization.

4139427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379812.

The product of its digits is 6048, while the sum is 30.

The square root of 4139427 is about 2034.5581829970. The cubic root of 4139427 is about 160.5634690412.

The spelling of 4139427 in words is "four million, one hundred thirty-nine thousand, four hundred twenty-seven".