4242139 has 6 divisors (see below), whose sum is σ = 4662980. Its totient is φ = 3856380.

The previous prime is 4242137. The next prime is 4242167. The reversal of 4242139 is 9312424.

It is not a de Polignac number, because 4242139 - 2¹ = 4242137 is a prime.

It is a super-3 number, since 3×4242139³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4242131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17409 + ... + 17650.

Almost surely, 2^4242139 is an apocalyptic number.

4242139 is a deficient number, since it is larger than the sum of its proper divisors (420841).

4242139 is a wasteful number, since it uses less digits than its factorization.

4242139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35081 (or 35070 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 4242139 is about 2059.6453578226. The cubic root of 4242139 is about 161.8806594524.

The spelling of 4242139 in words is "four million, two hundred forty-two thousand, one hundred thirty-nine".