5197621 has 16 divisors (see below), whose sum is σ = 6431040. Its totient is φ = 4129920.

The previous prime is 5197607. The next prime is 5197637. The reversal of 5197621 is 1267915.

5197621 = 514² + 515² + ... + 532².

It is a cyclic number.

It is not a de Polignac number, because 5197621 - 2¹¹ = 5195573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5197601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1761 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (401940).

Almost surely, 2^5197621 is an apocalyptic number.

It is an amenable number.

5197621 is a deficient number, since it is larger than the sum of its proper divisors (1233419).

5197621 is a wasteful number, since it uses less digits than its factorization.

5197621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956.

The product of its digits is 3780, while the sum is 31.

The square root of 5197621 is about 2279.8291602662. The cubic root of 5197621 is about 173.2213967453.

Subtracting from 5197621 its product of digits (3780), we obtain a square (5193841 = 2279²).

The spelling of 5197621 in words is "five million, one hundred ninety-seven thousand, six hundred twenty-one".