1834421 has 2 divisors, whose sum is σ = 1834422. Its totient is φ = 1834420.

The previous prime is 1834403. The next prime is 1834429. The reversal of 1834421 is 1244381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 180625 = 1286^2 + 425^2 .

It is an emirp because it is prime and its reverse (1244381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1834421 is a prime.

It is equal to p₁₃₇₄₈₀ and since 1834421 and 137480 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1834429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917210 + 917211.

It is an arithmetic number, because the mean of its divisors is an integer number (917211).

2^1834421 is an apocalyptic number.

It is an amenable number.

1834421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1834421 is an equidigital number, since it uses as much as digits as its factorization.

1834421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 1834421 is about 1354.4079887538. The cubic root of 1834421 is about 122.4145398664.

The spelling of 1834421 in words is "one million, eight hundred thirty-four thousand, four hundred twenty-one".