1423521 has 16 divisors (see below), whose sum is σ = 2301120. Its totient is φ = 862560.

The previous prime is 1423511. The next prime is 1423547. The reversal of 1423521 is 1253241.

1423521 is a `hidden beast` number, since 142 + 3 + 521 = 666.

It is not a de Polignac number, because 1423521 - 2¹¹ = 1421473 is a prime.

It is a Curzon number.

1423521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1423494 and 1423503.

It is not an unprimeable number, because it can be changed into a prime (1423511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2100 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (143820).

2^1423521 is an apocalyptic number.

1423521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1423521 is a deficient number, since it is larger than the sum of its proper divisors (877599).

1423521 is a wasteful number, since it uses less digits than its factorization.

1423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813 (or 4807 counting only the distinct ones).

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

The square root of 1423521 is about 1193.1139928775. The cubic root of 1423521 is about 112.4919105294.

Adding to 1423521 its reverse (1253241), we get a palindrome (2676762).

It can be divided in two parts, 142 and 3521, that added together give a palindrome (3663).

The spelling of 1423521 in words is "one million, four hundred twenty-three thousand, five hundred twenty-one".