1123201242 has 40 divisors (see below), whose sum is σ = 2539116756. Its totient is φ = 371081088.

The previous prime is 1123201241. The next prime is 1123201243. The reversal of 1123201242 is 2421023211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1123201241) and next prime (1123201243).

It can be written as a sum of positive squares in 2 ways, for example, as 1120307841 + 2893401 = 33471^2 + 1701^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1123201241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12373 + ... + 48984.

Almost surely, 2^1123201242 is an apocalyptic number.

1123201242 is an abundant number, since it is smaller than the sum of its proper divisors (1415915514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123201242 is a wasteful number, since it uses less digits than its factorization.

1123201242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61484 (or 61475 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1123201242 is about 33514.1946345127. The cubic root of 1123201242 is about 1039.4873095532.

Adding to 1123201242 its reverse (2421023211), we get a palindrome (3544224453).

The spelling of 1123201242 in words is "one billion, one hundred twenty-three million, two hundred one thousand, two hundred forty-two".