1525217 has 2 divisors, whose sum is σ = 1525218. Its totient is φ = 1525216.

The previous prime is 1525207. The next prime is 1525219. The reversal of 1525217 is 7125251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437601 + 87616 = 1199^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525217 - 2¹⁴ = 1508833 is a prime.

Together with 1525219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1525192 and 1525201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525219) 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 as a sum of consecutive naturals, namely, 762608 + 762609.

It is an arithmetic number, because the mean of its divisors is an integer number (762609).

2^1525217 is an apocalyptic number.

It is an amenable number.

1525217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525217 is an equidigital number, since it uses as much as digits as its factorization.

1525217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 23.

The square root of 1525217 is about 1234.9967611294. The cubic root of 1525217 is about 115.1093352110.

The spelling of 1525217 in words is "one million, five hundred twenty-five thousand, two hundred seventeen".