1243601604 has 72 divisors (see below), whose sum is σ = 3781727040. Its totient is φ = 336612672.

The previous prime is 1243601603. The next prime is 1243601617. The reversal of 1243601604 is 4061063421.

1243601604 is a `hidden beast` number, since 1 + 24 + 36 + 0 + 1 + 604 = 666.

1243601604 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1243601603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125079 + ... + 134654.

Almost surely, 2^1243601604 is an apocalyptic number.

1243601604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1243601604 is an abundant number, since it is smaller than the sum of its proper divisors (2538125436).

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

1243601604 is a wasteful number, since it uses less digits than its factorization.

1243601604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259769 (or 259764 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1243601604 is about 35264.7359836991. The cubic root of 1243601604 is about 1075.3762098432.

The spelling of 1243601604 in words is "one billion, two hundred forty-three million, six hundred one thousand, six hundred four".