1478639 has 2 divisors, whose sum is σ = 1478640. Its totient is φ = 1478638.

The previous prime is 1478627. The next prime is 1478663. The reversal of 1478639 is 9368741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1478639 - 2¹⁶ = 1413103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1478689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739319 + 739320.

It is an arithmetic number, because the mean of its divisors is an integer number (739320).

2^1478639 is an apocalyptic number.

1478639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478639 is an equidigital number, since it uses as much as digits as its factorization.

1478639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 1478639 is about 1215.9930098483. The cubic root of 1478639 is about 113.9254411416.

The spelling of 1478639 in words is "one million, four hundred seventy-eight thousand, six hundred thirty-nine".