1243379752 has 16 divisors (see below), whose sum is σ = 2332149300. Its totient is φ = 621473280.

The previous prime is 1243379723. The next prime is 1243379771. The reversal of 1243379752 is 2579733421.

It can be written as a sum of positive squares in 2 ways, for example, as 829094436 + 414285316 = 28794^2 + 20354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1243379699 and 1243379708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1227 + ... + 49882.

Almost surely, 2^1243379752 is an apocalyptic number.

It is an amenable number.

1243379752 is a deficient number, since it is larger than the sum of its proper divisors (1088769548).

1243379752 is a wasteful number, since it uses less digits than its factorization.

1243379752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54156 (or 54152 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 1243379752 is about 35261.5903214815. The cubic root of 1243379752 is about 1075.3122588827.

The spelling of 1243379752 in words is "one billion, two hundred forty-three million, three hundred seventy-nine thousand, seven hundred fifty-two".