1525505 has 4 divisors (see below), whose sum is σ = 1830612. Its totient is φ = 1220400.

The previous prime is 1525501. The next prime is 1525507. The reversal of 1525505 is 5055251.

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 1100401 + 425104 = 1049^2 + 652^2 .

It is not a de Polignac number, because 1525505 - 2² = 1525501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1525501) 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, 152546 + ... + 152555.

It is an arithmetic number, because the mean of its divisors is an integer number (457653).

2^1525505 is an apocalyptic number.

It is an amenable number.

1525505 is a deficient number, since it is larger than the sum of its proper divisors (305107).

1525505 is an equidigital number, since it uses as much as digits as its factorization.

1525505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305106.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 1525505 is about 1235.1133551217. The cubic root of 1525505 is about 115.1165799511.

The spelling of 1525505 in words is "one million, five hundred twenty-five thousand, five hundred five".