1381272874 has 4 divisors (see below), whose sum is σ = 2071909314. Its totient is φ = 690636436.

The previous prime is 1381272817. The next prime is 1381272877. The reversal of 1381272874 is 4782721831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4782721831 = 1549 ⋅3087619.

It can be written as a sum of positive squares in only one way, i.e., 1126072249 + 255200625 = 33557^2 + 15975^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1381272874.

It is not an unprimeable number, because it can be changed into a prime (1381272877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345318217 + ... + 345318220.

Almost surely, 2^1381272874 is an apocalyptic number.

1381272874 is a deficient number, since it is larger than the sum of its proper divisors (690636440).

1381272874 is an equidigital number, since it uses as much as digits as its factorization.

1381272874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690636439.

The product of its digits is 150528, while the sum is 43.

The square root of 1381272874 is about 37165.4796013720. The cubic root of 1381272874 is about 1113.6784799074.

The spelling of 1381272874 in words is "one billion, three hundred eighty-one million, two hundred seventy-two thousand, eight hundred seventy-four".