1553604 has 48 divisors (see below), whose sum is σ = 4083072. Its totient is φ = 456192.

The previous prime is 1553597. The next prime is 1553653. The reversal of 1553604 is 4063551.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3372 + ... + 3804.

It is an arithmetic number, because the mean of its divisors is an integer number (85064).

2^1553604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041536).

1553604 is an abundant number, since it is smaller than the sum of its proper divisors (2529468).

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

1553604 is a wasteful number, since it uses less digits than its factorization.

1553604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1553604 is about 1246.4365206460. The cubic root of 1553604 is about 115.8190798442.

The spelling of 1553604 in words is "one million, five hundred fifty-three thousand, six hundred four".