1423505521 has 2 divisors, whose sum is σ = 1423505522. Its totient is φ = 1423505520.

The previous prime is 1423505471. The next prime is 1423505537. The reversal of 1423505521 is 1255053241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1408951296 + 14554225 = 37536^2 + 3815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423505521 - 2¹⁵ = 1423472753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1423505521.

It is not a weakly prime, because it can be changed into another prime (1423505561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711752760 + 711752761.

It is an arithmetic number, because the mean of its divisors is an integer number (711752761).

Almost surely, 2^1423505521 is an apocalyptic number.

It is an amenable number.

1423505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423505521 is an equidigital number, since it uses as much as digits as its factorization.

1423505521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1423505521 is about 37729.3721257060. The cubic root of 1423505521 is about 1124.9150279196.

Adding to 1423505521 its reverse (1255053241), we get a palindrome (2678558762).

It can be divided in two parts, 1423 and 505521, that added together give a square (506944 = 712²).

The spelling of 1423505521 in words is "one billion, four hundred twenty-three million, five hundred five thousand, five hundred twenty-one".