1845187145 has 4 divisors (see below), whose sum is σ = 2214224580. Its totient is φ = 1476149712.

The previous prime is 1845187133. The next prime is 1845187159. The reversal of 1845187145 is 5417815481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1302343744 + 542843401 = 36088^2 + 23299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1845187145 - 2¹² = 1845183049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1845187096 and 1845187105.

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, 184518710 + ... + 184518719.

It is an arithmetic number, because the mean of its divisors is an integer number (553556145).

Almost surely, 2^1845187145 is an apocalyptic number.

It is an amenable number.

1845187145 is a deficient number, since it is larger than the sum of its proper divisors (369037435).

1845187145 is an equidigital number, since it uses as much as digits as its factorization.

1845187145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369037434.

The product of its digits is 179200, while the sum is 44.

The square root of 1845187145 is about 42955.6415968846. The cubic root of 1845187145 is about 1226.5355493109.

The spelling of 1845187145 in words is "one billion, eight hundred forty-five million, one hundred eighty-seven thousand, one hundred forty-five".