1043639 has 2 divisors, whose sum is σ = 1043640. Its totient is φ = 1043638.

The previous prime is 1043617. The next prime is 1043657. The reversal of 1043639 is 9363401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1043639 - 2¹² = 1039543 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1043839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521819 + 521820.

It is an arithmetic number, because the mean of its divisors is an integer number (521820).

2^1043639 is an apocalyptic number.

1043639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043639 is an equidigital number, since it uses as much as digits as its factorization.

1043639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1043639 is about 1021.5865112657. The cubic root of 1043639 is about 101.4339722802.

The spelling of 1043639 in words is "one million, forty-three thousand, six hundred thirty-nine".