1220423524 has 12 divisors (see below), whose sum is σ = 2143032444. Its totient is φ = 608128544.

The previous prime is 1220423513. The next prime is 1220423551. The reversal of 1220423524 is 4253240221.

It can be written as a sum of positive squares in 2 ways, for example, as 596922624 + 623500900 = 24432^2 + 24970^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519487 + ... + 521830.

It is an arithmetic number, because the mean of its divisors is an integer number (178586037).

Almost surely, 2^1220423524 is an apocalyptic number.

It is an amenable number.

1220423524 is a deficient number, since it is larger than the sum of its proper divisors (922608920).

1220423524 is a wasteful number, since it uses less digits than its factorization.

1220423524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041614 (or 1041612 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1220423524 is about 34934.5605954905. The cubic root of 1220423524 is about 1068.6533628341.

Adding to 1220423524 its reverse (4253240221), we get a palindrome (5473663745).

The spelling of 1220423524 in words is "one billion, two hundred twenty million, four hundred twenty-three thousand, five hundred twenty-four".