1522009 has 2 divisors, whose sum is σ = 1522010. Its totient is φ = 1522008.

The previous prime is 1521991. The next prime is 1522019. The reversal of 1522009 is 9002251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 278784 = 1115^2 + 528^2 .

It is an emirp because it is prime and its reverse (9002251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1522009 - 2⁹ = 1521497 is a prime.

It is a super-2 number, since 2×1522009² = 4633022792162, which contains 22 as substring.

1522009 is a lucky number.

It is equal to p₁₁₅₇₂₃ and since 1522009 and 115723 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1522019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761004 + 761005.

It is an arithmetic number, because the mean of its divisors is an integer number (761005).

2^1522009 is an apocalyptic number.

It is an amenable number.

1522009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522009 is an equidigital number, since it uses as much as digits as its factorization.

1522009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1522009 is about 1233.6972886409. The cubic root of 1522009 is about 115.0285751297.

The spelling of 1522009 in words is "one million, five hundred twenty-two thousand, nine".