1102639 has 4 divisors (see below), whose sum is σ = 1138240. Its totient is φ = 1067040.

The previous prime is 1102583. The next prime is 1102663. The reversal of 1102639 is 9362011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9362011 = 263 ⋅35597.

It is a cyclic number.

It is not a de Polignac number, because 1102639 - 2¹¹ = 1100591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17754 + ... + 17815.

It is an arithmetic number, because the mean of its divisors is an integer number (284560).

2^1102639 is an apocalyptic number.

1102639 is a deficient number, since it is larger than the sum of its proper divisors (35601).

1102639 is an equidigital number, since it uses as much as digits as its factorization.

1102639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35600.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1102639 is about 1050.0661883900. The cubic root of 1102639 is about 103.3104967456.

The spelling of 1102639 in words is "one million, one hundred two thousand, six hundred thirty-nine".