1099554 has 8 divisors (see below), whose sum is σ = 2199120. Its totient is φ = 366516.

The previous prime is 1099547. The next prime is 1099559. The reversal of 1099554 is 4559901.

It is a sphenic number, since it is the product of 3 distinct primes.

1099554 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1099559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91624 + ... + 91635.

It is an arithmetic number, because the mean of its divisors is an integer number (274890).

2^1099554 is an apocalyptic number.

1099554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1099554 is a wasteful number, since it uses less digits than its factorization.

1099554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183264.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 1099554 is about 1048.5962044562. The cubic root of 1099554 is about 103.2140582375.

It can be divided in two parts, 1099 and 554, that added together give a triangular number (1653 = T₅₇).

The spelling of 1099554 in words is "one million, ninety-nine thousand, five hundred fifty-four".