4271421 has 36 divisors (see below), whose sum is σ = 7333088. Its totient is φ = 2164800.

The previous prime is 4271417. The next prime is 4271441. The reversal of 4271421 is 1241724.

4271421 = 84² + 85² + ... + 237².

It is a happy number.

It is not a de Polignac number, because 4271421 - 2² = 4271417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4271401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 104161 + ... + 104201.

Almost surely, 2^4271421 is an apocalyptic number.

4271421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4271421 is a deficient number, since it is larger than the sum of its proper divisors (3061667).

4271421 is a wasteful number, since it uses less digits than its factorization.

4271421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 62 counting only the distinct ones).

The product of its digits is 448, while the sum is 21.

The square root of 4271421 is about 2066.7416384251. The cubic root of 4271421 is about 162.2522742188.

Multiplying 4271421 by its sum of digits (21), we get a square (89699841 = 9471²).

4271421 divided by its sum of digits (21) gives a square (203401 = 451²).

The spelling of 4271421 in words is "four million, two hundred seventy-one thousand, four hundred twenty-one".