4151421 has 6 divisors (see below), whose sum is σ = 5996510. Its totient is φ = 2767608.

The previous prime is 4151377. The next prime is 4151423. The reversal of 4151421 is 1241514.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 171396 = 1995^2 + 414^2 .

It is not a de Polignac number, because 4151421 - 2¹¹ = 4149373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4151394 and 4151403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4151423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230626 + ... + 230643.

Almost surely, 2^4151421 is an apocalyptic number.

It is an amenable number.

4151421 is a deficient number, since it is larger than the sum of its proper divisors (1845089).

4151421 is a wasteful number, since it uses less digits than its factorization.

4151421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461275 (or 461272 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 4151421 is about 2037.5036196287. The cubic root of 4151421 is about 160.7183971858.

Adding to 4151421 its reverse (1241514), we get a palindrome (5392935).

The spelling of 4151421 in words is "four million, one hundred fifty-one thousand, four hundred twenty-one".