1421039 has 2 divisors, whose sum is σ = 1421040. Its totient is φ = 1421038.

The previous prime is 1421027. The next prime is 1421041. The reversal of 1421039 is 9301241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421039 - 2¹⁶ = 1355503 is a prime.

Together with 1421041, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1421039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710519 + 710520.

It is an arithmetic number, because the mean of its divisors is an integer number (710520).

2^1421039 is an apocalyptic number.

1421039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421039 is an equidigital number, since it uses as much as digits as its factorization.

1421039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1421039 is about 1192.0734037802. The cubic root of 1421039 is about 112.4264935458.

The spelling of 1421039 in words is "one million, four hundred twenty-one thousand, thirty-nine".