1182421 has 2 divisors, whose sum is σ = 1182422. Its totient is φ = 1182420.

The previous prime is 1182413. The next prime is 1182431. The reversal of 1182421 is 1242811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 3025 = 1086^2 + 55^2 .

It is an emirp because it is prime and its reverse (1242811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1182421 - 2³ = 1182413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1182431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591210 + 591211.

It is an arithmetic number, because the mean of its divisors is an integer number (591211).

2^1182421 is an apocalyptic number.

It is an amenable number.

1182421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1182421 is an equidigital number, since it uses as much as digits as its factorization.

1182421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 19.

The square root of 1182421 is about 1087.3918337012. The cubic root of 1182421 is about 105.7444001826.

The spelling of 1182421 in words is "one million, one hundred eighty-two thousand, four hundred twenty-one".