5197561 has 4 divisors (see below), whose sum is σ = 5249124. Its totient is φ = 5146000.

The previous prime is 5197537. The next prime is 5197573. The reversal of 5197561 is 1657915.

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 3861225 + 1336336 = 1965^2 + 1156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5197561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5194561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25630 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (1312281).

Almost surely, 2^5197561 is an apocalyptic number.

It is an amenable number.

5197561 is a deficient number, since it is larger than the sum of its proper divisors (51563).

5197561 is a wasteful number, since it uses less digits than its factorization.

5197561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51562.

The product of its digits is 9450, while the sum is 34.

The square root of 5197561 is about 2279.8160013475. The cubic root of 5197561 is about 173.2207302017.

The spelling of 5197561 in words is "five million, one hundred ninety-seven thousand, five hundred sixty-one".