1099544 has 8 divisors (see below), whose sum is σ = 2061660. Its totient is φ = 549768.

The previous prime is 1099541. The next prime is 1099547. The reversal of 1099544 is 4459901.

Added to its reverse (4459901) it gives a triangular number (5559445 = T₃₃₃₄).

It is an interprime number because it is at equal distance from previous prime (1099541) and next prime (1099547).

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1099544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68714 + ... + 68729.

2^1099544 is an apocalyptic number.

It is an amenable number.

1099544 is a deficient number, since it is larger than the sum of its proper divisors (962116).

1099544 is a wasteful number, since it uses less digits than its factorization.

1099544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137449 (or 137445 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1099544 is about 1048.5914361657. The cubic root of 1099544 is about 103.2137453398.

Adding to 1099544 its reverse (4459901), we get a triangular number (5559445 = T₃₃₃₄).

The spelling of 1099544 in words is "one million, ninety-nine thousand, five hundred forty-four".