5557021 has 4 divisors (see below), whose sum is σ = 5564700. Its totient is φ = 5549344.

The previous prime is 5556983. The next prime is 5557031. The reversal of 5557021 is 1207555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1207555 = 5 ⋅241511.

It can be written as a sum of positive squares in 2 ways, for example, as 2134521 + 3422500 = 1461^2 + 1850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5557021 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 (5557031) 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, 2626 + ... + 4243.

It is an arithmetic number, because the mean of its divisors is an integer number (1391175).

Almost surely, 2^5557021 is an apocalyptic number.

It is an amenable number.

5557021 is a deficient number, since it is larger than the sum of its proper divisors (7679).

5557021 is an equidigital number, since it uses as much as digits as its factorization.

5557021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 5557021 is about 2357.3334511689. Note that the first 3 decimals coincide. The cubic root of 5557021 is about 177.1253328323.

The spelling of 5557021 in words is "five million, five hundred fifty-seven thousand, twenty-one".