5431421 has 4 divisors (see below), whose sum is σ = 5440512. Its totient is φ = 5422332.

The previous prime is 5431399. The next prime is 5431441. The reversal of 5431421 is 1241345.

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 5431421 - 2¹⁴ = 5415037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5431393 and 5431402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5431441) 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, 3581 + ... + 4866.

It is an arithmetic number, because the mean of its divisors is an integer number (1360128).

Almost surely, 2^5431421 is an apocalyptic number.

It is an amenable number.

5431421 is a deficient number, since it is larger than the sum of its proper divisors (9091).

5431421 is an equidigital number, since it uses as much as digits as its factorization.

5431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090.

The product of its digits is 480, while the sum is 20.

The square root of 5431421 is about 2330.5409243349. The cubic root of 5431421 is about 175.7806862790.

Adding to 5431421 its reverse (1241345), we get a palindrome (6672766).

The spelling of 5431421 in words is "five million, four hundred thirty-one thousand, four hundred twenty-one".