5122661 has 4 divisors (see below), whose sum is σ = 5424012. Its totient is φ = 4821312.

The previous prime is 5122651. The next prime is 5122669. The reversal of 5122661 is 1662215.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4330561 + 792100 = 2081^2 + 890^2 .

It is a cyclic number.

It is not a de Polignac number, because 5122661 - 2¹⁸ = 4860517 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 (5122669) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 150650 + ... + 150683.

It is an arithmetic number, because the mean of its divisors is an integer number (1356003).

Almost surely, 2^5122661 is an apocalyptic number.

It is an amenable number.

5122661 is a deficient number, since it is larger than the sum of its proper divisors (301351).

5122661 is a wasteful number, since it uses less digits than its factorization.

5122661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301350.

The product of its digits is 720, while the sum is 23.

The square root of 5122661 is about 2263.3296268993. The cubic root of 5122661 is about 172.3846291495.

Adding to 5122661 its reverse (1662215), we get a palindrome (6784876).

The spelling of 5122661 in words is "five million, one hundred twenty-two thousand, six hundred sixty-one".