5445421 has 2 divisors, whose sum is σ = 5445422. Its totient is φ = 5445420.

The previous prime is 5445413. The next prime is 5445431. The reversal of 5445421 is 1245445.

It is a happy number.

5445421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 972196 = 2115^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 5445421 - 2³ = 5445413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5445431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2722710 + 2722711.

It is an arithmetic number, because the mean of its divisors is an integer number (2722711).

Almost surely, 2^5445421 is an apocalyptic number.

It is an amenable number.

5445421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5445421 is an equidigital number, since it uses as much as digits as its factorization.

5445421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 25.

The square root of 5445421 is about 2333.5425858552. The cubic root of 5445421 is about 175.9315871332.

It can be divided in two parts, 5 and 445421, that multiplied together give a triangular number (2227105 = T₂₁₁₀).

The spelling of 5445421 in words is "five million, four hundred forty-five thousand, four hundred twenty-one".