6355421 has 4 divisors (see below), whose sum is σ = 6463200. Its totient is φ = 6247644.

The previous prime is 6355381. The next prime is 6355457. The reversal of 6355421 is 1245536.

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 6355421 - 2¹⁴ = 6339037 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 (6355121) 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, 53801 + ... + 53918.

It is an arithmetic number, because the mean of its divisors is an integer number (1615800).

Almost surely, 2^6355421 is an apocalyptic number.

It is an amenable number.

6355421 is a deficient number, since it is larger than the sum of its proper divisors (107779).

6355421 is a wasteful number, since it uses less digits than its factorization.

6355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107778.

The product of its digits is 3600, while the sum is 26.

The square root of 6355421 is about 2520.9960333170. The cubic root of 6355421 is about 185.2314706738.

It can be divided in two parts, 6355 and 421, that added together give a palindrome (6776).

The spelling of 6355421 in words is "six million, three hundred fifty-five thousand, four hundred twenty-one".