1525313 has 8 divisors (see below), whose sum is σ = 1593000. Its totient is φ = 1458688.

The previous prime is 1525297. The next prime is 1525331. The reversal of 1525313 is 3135251.

It can be written as a sum of positive squares in 4 ways, for example, as 29584 + 1495729 = 172^2 + 1223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1525313 - 2⁴ = 1525297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4145 + ... + 4497.

It is an arithmetic number, because the mean of its divisors is an integer number (199125).

2^1525313 is an apocalyptic number.

It is an amenable number.

1525313 is a deficient number, since it is larger than the sum of its proper divisors (67687).

1525313 is a wasteful number, since it uses less digits than its factorization.

1525313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its digits is 450, while the sum is 20.

The square root of 1525313 is about 1235.0356270165. The cubic root of 1525313 is about 115.1117502257. Note that the first 3 decimals are identical.

The spelling of 1525313 in words is "one million, five hundred twenty-five thousand, three hundred thirteen".