1243653604 has 24 divisors (see below), whose sum is σ = 2236966200. Its totient is φ = 604750080.

The previous prime is 1243653599. The next prime is 1243653637. The reversal of 1243653604 is 4063563421.

It can be written as a sum of positive squares in 4 ways, for example, as 55472704 + 1188180900 = 7448^2 + 34470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243653604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6919 + ... + 50350.

It is an arithmetic number, because the mean of its divisors is an integer number (93206925).

Almost surely, 2^1243653604 is an apocalyptic number.

It is an amenable number.

1243653604 is a deficient number, since it is larger than the sum of its proper divisors (993312596).

1243653604 is a wasteful number, since it uses less digits than its factorization.

1243653604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57423 (or 57421 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 1243653604 is about 35265.4732564303. The cubic root of 1243653604 is about 1075.3911982402.

The spelling of 1243653604 in words is "one billion, two hundred forty-three million, six hundred fifty-three thousand, six hundred four".