5138642 has 4 divisors (see below), whose sum is σ = 7707966. Its totient is φ = 2569320.

The previous prime is 5138633. The next prime is 5138657. The reversal of 5138642 is 2468315.

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

It can be written as a sum of positive squares in only one way, i.e., 4791721 + 346921 = 2189^2 + 589^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284659 + ... + 1284662.

Almost surely, 2^5138642 is an apocalyptic number.

5138642 is a deficient number, since it is larger than the sum of its proper divisors (2569324).

5138642 is a wasteful number, since it uses less digits than its factorization.

5138642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569323.

The product of its digits is 5760, while the sum is 29.

The square root of 5138642 is about 2266.8572959055. The cubic root of 5138642 is about 172.5637039796.

It can be divided in two parts, 5138 and 642, that multiplied together give a triangular number (3298596 = T₂₅₆₈).

The spelling of 5138642 in words is "five million, one hundred thirty-eight thousand, six hundred forty-two".