5139945 has 12 divisors (see below), whose sum is σ = 8909316. Its totient is φ = 2741280.

The previous prime is 5139923. The next prime is 5139949. The reversal of 5139945 is 5499315.

It can be written as a sum of positive squares in 2 ways, for example, as 2277081 + 2862864 = 1509^2 + 1692^2 .

It is not a de Polignac number, because 5139945 - 2⁵ = 5139913 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 57066 + ... + 57155.

It is an arithmetic number, because the mean of its divisors is an integer number (742443).

Almost surely, 2^5139945 is an apocalyptic number.

It is an amenable number.

5139945 is a deficient number, since it is larger than the sum of its proper divisors (3769371).

5139945 is a wasteful number, since it uses less digits than its factorization.

5139945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114232 (or 114229 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 5139945 is about 2267.1446799885. The cubic root of 5139945 is about 172.5782883454.

It can be divided in two parts, 5139 and 945, that added together give a square (6084 = 78²).

The spelling of 5139945 in words is "five million, one hundred thirty-nine thousand, nine hundred forty-five".