1525523 has 4 divisors (see below), whose sum is σ = 1548360. Its totient is φ = 1502688.

The previous prime is 1525507. The next prime is 1525561. The reversal of 1525523 is 3255251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3255251 = 19 ⋅171329.

It is a cyclic number.

It is not a de Polignac number, because 1525523 - 2⁴ = 1525507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11318 + ... + 11451.

It is an arithmetic number, because the mean of its divisors is an integer number (387090).

2^1525523 is an apocalyptic number.

1525523 is a deficient number, since it is larger than the sum of its proper divisors (22837).

1525523 is an equidigital number, since it uses as much as digits as its factorization.

1525523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22836.

The product of its digits is 1500, while the sum is 23.

The square root of 1525523 is about 1235.1206418808. The cubic root of 1525523 is about 115.1170327171.

It can be divided in two parts, 1525 and 523, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1525523 in words is "one million, five hundred twenty-five thousand, five hundred twenty-three".