1386815242 has 8 divisors (see below), whose sum is σ = 2130960132. Its totient is φ = 676495200.

The previous prime is 1386815179. The next prime is 1386815251. The reversal of 1386815242 is 2425186831.

It can be written as a sum of positive squares in 2 ways, for example, as 1367446441 + 19368801 = 36979^2 + 4401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1386815195 and 1386815204.

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, 8456109 + ... + 8456272.

Almost surely, 2^1386815242 is an apocalyptic number.

1386815242 is a deficient number, since it is larger than the sum of its proper divisors (744144890).

1386815242 is a wasteful number, since it uses less digits than its factorization.

1386815242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16912424.

The product of its digits is 92160, while the sum is 40.

The square root of 1386815242 is about 37239.9683404806. The cubic root of 1386815242 is about 1115.1660398765.

The spelling of 1386815242 in words is "one billion, three hundred eighty-six million, eight hundred fifteen thousand, two hundred forty-two".