1575485845 has 4 divisors (see below), whose sum is σ = 1890583020. Its totient is φ = 1260388672.

The previous prime is 1575485839. The next prime is 1575485903. The reversal of 1575485845 is 5485845751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5485845751 = 15619 ⋅351229.

It can be written as a sum of positive squares in 2 ways, for example, as 479478609 + 1096007236 = 21897^2 + 33106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1575485845 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1575485792 and 1575485801.

It is a congruent number.

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, 157548580 + ... + 157548589.

It is an arithmetic number, because the mean of its divisors is an integer number (472645755).

Almost surely, 2^1575485845 is an apocalyptic number.

It is an amenable number.

1575485845 is a deficient number, since it is larger than the sum of its proper divisors (315097175).

1575485845 is an equidigital number, since it uses as much as digits as its factorization.

1575485845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315097174.

The product of its digits is 4480000, while the sum is 52.

The square root of 1575485845 is about 39692.3902656416. The cubic root of 1575485845 is about 1163.6030078357.

The spelling of 1575485845 in words is "one billion, five hundred seventy-five million, four hundred eighty-five thousand, eight hundred forty-five".