1243604 has 6 divisors (see below), whose sum is σ = 2176314. Its totient is φ = 621800.

The previous prime is 1243579. The next prime is 1243609. The reversal of 1243604 is 4063421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1106704 + 136900 = 1052^2 + 370^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155447 + ... + 155454.

It is an arithmetic number, because the mean of its divisors is an integer number (362719).

2^1243604 is an apocalyptic number.

It is an amenable number.

1243604 is a deficient number, since it is larger than the sum of its proper divisors (932710).

1243604 is a wasteful number, since it uses less digits than its factorization.

1243604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310905 (or 310903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243604 is about 1115.1699422061. The cubic root of 1243604 is about 107.5376900472.

The spelling of 1243604 in words is "one million, two hundred forty-three thousand, six hundred four".