1525317 has 4 divisors (see below), whose sum is σ = 2033760. Its totient is φ = 1016876.

The previous prime is 1525297. The next prime is 1525331. The reversal of 1525317 is 7135251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1525317 - 2¹⁰ = 1524293 is a prime.

It is a D-number.

1525317 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525357) 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, 254217 + ... + 254222.

It is an arithmetic number, because the mean of its divisors is an integer number (508440).

2^1525317 is an apocalyptic number.

It is an amenable number.

1525317 is a deficient number, since it is larger than the sum of its proper divisors (508443).

1525317 is an equidigital number, since it uses as much as digits as its factorization.

1525317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508442.

The product of its digits is 1050, while the sum is 24.

The square root of 1525317 is about 1235.0372464019. The cubic root of 1525317 is about 115.1118508491. Note that the first 3 decimals are identical.

The spelling of 1525317 in words is "one million, five hundred twenty-five thousand, three hundred seventeen".