1220434523 has 24 divisors (see below), whose sum is σ = 1563035760. Its totient is φ = 942217920.

The previous prime is 1220434517. The next prime is 1220434583. The reversal of 1220434523 is 3254340221.

It is not a de Polignac number, because 1220434523 - 2⁴ = 1220434507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220434492 and 1220434501.

It is not an unprimeable number, because it can be changed into a prime (1220434583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48365 + ... + 69137.

It is an arithmetic number, because the mean of its divisors is an integer number (65126490).

Almost surely, 2^1220434523 is an apocalyptic number.

1220434523 is a deficient number, since it is larger than the sum of its proper divisors (342601237).

1220434523 is a wasteful number, since it uses less digits than its factorization.

1220434523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20907 (or 20900 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 1220434523 is about 34934.7180180404. The cubic root of 1220434523 is about 1068.6565732177.

Adding to 1220434523 its reverse (3254340221), we get a palindrome (4474774744).

The spelling of 1220434523 in words is "one billion, two hundred twenty million, four hundred thirty-four thousand, five hundred twenty-three".