1381804562 has 4 divisors (see below), whose sum is σ = 2072706846. Its totient is φ = 690902280.

The previous prime is 1381804561. The next prime is 1381804573. The reversal of 1381804562 is 2654081831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2654081831 = 349 ⋅7604819.

It can be written as a sum of positive squares in only one way, i.e., 1206798121 + 175006441 = 34739^2 + 13229^2 .

It is not an unprimeable number, because it can be changed into a prime (1381804561) 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, 345451139 + ... + 345451142.

Almost surely, 2^1381804562 is an apocalyptic number.

1381804562 is a deficient number, since it is larger than the sum of its proper divisors (690902284).

1381804562 is an equidigital number, since it uses as much as digits as its factorization.

1381804562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690902283.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1381804562 is about 37172.6318949842. The cubic root of 1381804562 is about 1113.8213562199.

The spelling of 1381804562 in words is "one billion, three hundred eighty-one million, eight hundred four thousand, five hundred sixty-two".