5139942 has 16 divisors (see below), whose sum is σ = 10355520. Its totient is φ = 1700712.

The previous prime is 5139923. The next prime is 5139949. The reversal of 5139942 is 2499315.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5139949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2248 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (647220).

Almost surely, 2^5139942 is an apocalyptic number.

5139942 is an abundant number, since it is smaller than the sum of its proper divisors (5215578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5139942 is a wasteful number, since it uses less digits than its factorization.

5139942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307.

The product of its digits is 9720, while the sum is 33.

The square root of 5139942 is about 2267.1440183632. The cubic root of 5139942 is about 172.5782547694.

It can be divided in two parts, 51 and 39942, that added together give a palindrome (39993).

The spelling of 5139942 in words is "five million, one hundred thirty-nine thousand, nine hundred forty-two".