5540621 has 4 divisors (see below), whose sum is σ = 5561952. Its totient is φ = 5519292.

The previous prime is 5540611. The next prime is 5540641. The reversal of 5540621 is 1260455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5540621 - 2¹⁴ = 5524237 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 (5540611) 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, 10271 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (1390488).

Almost surely, 2^5540621 is an apocalyptic number.

It is an amenable number.

5540621 is a deficient number, since it is larger than the sum of its proper divisors (21331).

5540621 is a wasteful number, since it uses less digits than its factorization.

5540621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21330.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 5540621 is about 2353.8523743005. The cubic root of 5540621 is about 176.9509157735.

The spelling of 5540621 in words is "five million, five hundred forty thousand, six hundred twenty-one".