1543604 has 6 divisors (see below), whose sum is σ = 2701314. Its totient is φ = 771800.

The previous prime is 1543589. The next prime is 1543631. The reversal of 1543604 is 4063451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 547600 = 998^2 + 740^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1543604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192947 + ... + 192954.

It is an arithmetic number, because the mean of its divisors is an integer number (450219).

2^1543604 is an apocalyptic number.

It is an amenable number.

1543604 is a deficient number, since it is larger than the sum of its proper divisors (1157710).

1543604 is a wasteful number, since it uses less digits than its factorization.

1543604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385905 (or 385903 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1543604 is about 1242.4186090042. The cubic root of 1543604 is about 115.5700492723.

The spelling of 1543604 in words is "one million, five hundred forty-three thousand, six hundred four".