1243520004 has 24 divisors (see below), whose sum is σ = 2902694368. Its totient is φ = 414342720.

The previous prime is 1243519951. The next prime is 1243520009. The reversal of 1243520004 is 4000253421.

It is not an unprimeable number, because it can be changed into a prime (1243520009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13344 + ... + 51624.

Almost surely, 2^1243520004 is an apocalyptic number.

It is an amenable number.

1243520004 is an abundant number, since it is smaller than the sum of its proper divisors (1659174364).

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

1243520004 is a wasteful number, since it uses less digits than its factorization.

1243520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40995 (or 40993 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1243520004 is about 35263.5790015704. The cubic root of 1243520004 is about 1075.3526887472.

Adding to 1243520004 its reverse (4000253421), we get a palindrome (5243773425).

The spelling of 1243520004 in words is "one billion, two hundred forty-three million, five hundred twenty thousand, four".