1220403242 has 16 divisors (see below), whose sum is σ = 1949500872. Its totient is φ = 570984960.

The previous prime is 1220403211. The next prime is 1220403251. The reversal of 1220403242 is 2423040221.

It can be written as a sum of positive squares in 4 ways, for example, as 1181228161 + 39175081 = 34369^2 + 6259^2 .

It is a super-2 number, since 2×1220403242² = 2978768146168221128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97859 + ... + 109622.

Almost surely, 2^1220403242 is an apocalyptic number.

1220403242 is a deficient number, since it is larger than the sum of its proper divisors (729097630).

1220403242 is a wasteful number, since it uses less digits than its factorization.

1220403242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207673.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1220403242 is about 34934.2703086811. The cubic root of 1220403242 is about 1068.6474428817.

Adding to 1220403242 its reverse (2423040221), we get a palindrome (3643443463).

The spelling of 1220403242 in words is "one billion, two hundred twenty million, four hundred three thousand, two hundred forty-two".