1525289 has 4 divisors (see below), whose sum is σ = 1531860. Its totient is φ = 1518720.

The previous prime is 1525273. The next prime is 1525297. The reversal of 1525289 is 9825251.

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 1155625 + 369664 = 1075^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525289 - 2⁴ = 1525273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924 + ... + 3405.

It is an arithmetic number, because the mean of its divisors is an integer number (382965).

2^1525289 is an apocalyptic number.

It is an amenable number.

1525289 is a deficient number, since it is larger than the sum of its proper divisors (6571).

1525289 is an equidigital number, since it uses as much as digits as its factorization.

1525289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6570.

The product of its digits is 7200, while the sum is 32.

The square root of 1525289 is about 1235.0259106594. The cubic root of 1525289 is about 115.1111464816. Note that the first 4 decimals are identical.

The spelling of 1525289 in words is "one million, five hundred twenty-five thousand, two hundred eighty-nine".