1572985 has 4 divisors (see below), whose sum is σ = 1887588. Its totient is φ = 1258384.

The previous prime is 1572929. The next prime is 1572997. The reversal of 1572985 is 5892751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5892751 = 83 ⋅70997.

It can be written as a sum of positive squares in 2 ways, for example, as 1149184 + 423801 = 1072^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572985 - 2¹¹ = 1570937 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157294 + ... + 157303.

It is an arithmetic number, because the mean of its divisors is an integer number (471897).

2^1572985 is an apocalyptic number.

It is an amenable number.

1572985 is a deficient number, since it is larger than the sum of its proper divisors (314603).

1572985 is an equidigital number, since it uses as much as digits as its factorization.

1572985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314602.

The product of its digits is 25200, while the sum is 37.

The square root of 1572985 is about 1254.1869876538. The cubic root of 1572985 is about 116.2987000641.

The spelling of 1572985 in words is "one million, five hundred seventy-two thousand, nine hundred eighty-five".