1521323 has 2 divisors, whose sum is σ = 1521324. Its totient is φ = 1521322.

The previous prime is 1521301. The next prime is 1521337. The reversal of 1521323 is 3231251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1521323 - 2⁸ = 1521067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760661 + 760662.

It is an arithmetic number, because the mean of its divisors is an integer number (760662).

2^1521323 is an apocalyptic number.

1521323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521323 is an equidigital number, since it uses as much as digits as its factorization.

1521323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 17.

The square root of 1521323 is about 1233.4192312430. The cubic root of 1521323 is about 115.0112906369.

Adding to 1521323 its reverse (3231251), we get a palindrome (4752574).

The spelling of 1521323 in words is "one million, five hundred twenty-one thousand, three hundred twenty-three".