4123139 has 4 divisors (see below), whose sum is σ = 4127256. Its totient is φ = 4119024.

The previous prime is 4123127. The next prime is 4123153. The reversal of 4123139 is 9313214.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9313214 = 2 ⋅4656607.

It is a cyclic number.

It is not a de Polignac number, because 4123139 - 2¹² = 4119043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527 + ... + 2919.

It is an arithmetic number, because the mean of its divisors is an integer number (1031814).

Almost surely, 2^4123139 is an apocalyptic number.

4123139 is a deficient number, since it is larger than the sum of its proper divisors (4117).

4123139 is a wasteful number, since it uses less digits than its factorization.

4123139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116.

The product of its digits is 648, while the sum is 23.

The square root of 4123139 is about 2030.5514029445. The cubic root of 4123139 is about 160.3525948057.

The spelling of 4123139 in words is "four million, one hundred twenty-three thousand, one hundred thirty-nine".