4371421 has 2 divisors, whose sum is σ = 4371422. Its totient is φ = 4371420.

The previous prime is 4371407. The next prime is 4371457. The reversal of 4371421 is 1241734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4202500 + 168921 = 2050^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 4371421 - 2⁷ = 4371293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4371392 and 4371401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4371481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2185710 + 2185711.

It is an arithmetic number, because the mean of its divisors is an integer number (2185711).

Almost surely, 2^4371421 is an apocalyptic number.

It is an amenable number.

4371421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4371421 is an equidigital number, since it uses as much as digits as its factorization.

4371421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 22.

The square root of 4371421 is about 2090.7943466539. The cubic root of 4371421 is about 163.5087046898.

The spelling of 4371421 in words is "four million, three hundred seventy-one thousand, four hundred twenty-one".