5427421 has 2 divisors, whose sum is σ = 5427422. Its totient is φ = 5427420.

The previous prime is 5427413. The next prime is 5427431. The reversal of 5427421 is 1247245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4901796 + 525625 = 2214^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 5427421 - 2³ = 5427413 is a prime.

It is a super-2 number, since 2×5427421² = 58913797422482, which contains 22 as substring.

It is an Ulam number.

5427421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5427431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2713710 + 2713711.

It is an arithmetic number, because the mean of its divisors is an integer number (2713711).

Almost surely, 2^5427421 is an apocalyptic number.

It is an amenable number.

5427421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5427421 is an equidigital number, since it uses as much as digits as its factorization.

5427421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 25.

The square root of 5427421 is about 2329.6825964066. The cubic root of 5427421 is about 175.7375241291.

The spelling of 5427421 in words is "five million, four hundred twenty-seven thousand, four hundred twenty-one".