5555421 has 6 divisors (see below), whose sum is σ = 8024510. Its totient is φ = 3703608.

The previous prime is 5555401. The next prime is 5555461. The reversal of 5555421 is 1245555.

It can be written as a sum of positive squares in only one way, i.e., 4575321 + 980100 = 2139^2 + 990^2 .

It is not a de Polignac number, because 5555421 - 2⁶ = 5555357 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308626 + ... + 308643.

Almost surely, 2^5555421 is an apocalyptic number.

It is an amenable number.

5555421 is a deficient number, since it is larger than the sum of its proper divisors (2469089).

5555421 is a wasteful number, since it uses less digits than its factorization.

5555421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617275 (or 617272 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 5555421 is about 2356.9940602386. The cubic root of 5555421 is about 177.1083316527.

The spelling of 5555421 in words is "five million, five hundred fifty-five thousand, four hundred twenty-one".