1381867442 has 16 divisors (see below), whose sum is σ = 2092618752. Its totient is φ = 684346320.

The previous prime is 1381867433. The next prime is 1381867451. The reversal of 1381867442 is 2447681831.

It is an interprime number because it is at equal distance from previous prime (1381867433) and next prime (1381867451).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1381867393 and 1381867402.

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, 159092 + ... + 167552.

It is an arithmetic number, because the mean of its divisors is an integer number (130788672).

Almost surely, 2^1381867442 is an apocalyptic number.

1381867442 is a deficient number, since it is larger than the sum of its proper divisors (710751310).

1381867442 is a wasteful number, since it uses less digits than its factorization.

1381867442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9233.

The product of its digits is 258048, while the sum is 44.

The square root of 1381867442 is about 37173.4776688972. The cubic root of 1381867442 is about 1113.8382510415.

The spelling of 1381867442 in words is "one billion, three hundred eighty-one million, eight hundred sixty-seven thousand, four hundred forty-two".