1478021 has 2 divisors, whose sum is σ = 1478022. Its totient is φ = 1478020.

The previous prime is 1478017. The next prime is 1478027. The reversal of 1478021 is 1208741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1473796 + 4225 = 1214^2 + 65^2 .

It is an emirp because it is prime and its reverse (1208741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1478021 - 2² = 1478017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739010 + 739011.

It is an arithmetic number, because the mean of its divisors is an integer number (739011).

2^1478021 is an apocalyptic number.

It is an amenable number.

1478021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478021 is an equidigital number, since it uses as much as digits as its factorization.

1478021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1478021 is about 1215.7388699881. The cubic root of 1478021 is about 113.9095671445.

The spelling of 1478021 in words is "one million, four hundred seventy-eight thousand, twenty-one".