1521423 has 14 divisors (see below), whose sum is σ = 2282184. Its totient is φ = 1013796.

The previous prime is 1521397. The next prime is 1521479. The reversal of 1521423 is 3241251.

It is not a de Polignac number, because 1521423 - 2⁵ = 1521391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1521396 and 1521405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521323) 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 in 13 ways as a sum of consecutive naturals, for example, 315 + ... + 1772.

2^1521423 is an apocalyptic number.

1521423 is a deficient number, since it is larger than the sum of its proper divisors (760761).

1521423 is an frugal number, since it uses more digits than its factorization.

1521423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105 (or 2090 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1521423 is about 1233.4597682940. The cubic root of 1521423 is about 115.0138105657.

Adding to 1521423 its reverse (3241251), we get a palindrome (4762674).

The spelling of 1521423 in words is "one million, five hundred twenty-one thousand, four hundred twenty-three".