1212277242 has 64 divisors (see below), whose sum is σ = 2865798144. Its totient is φ = 337693440.

The previous prime is 1212277193. The next prime is 1212277247. The reversal of 1212277242 is 2427722121.

It is a super-2 number, since 2×1212277242² = 2939232222942253128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212277247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35683 + ... + 60809.

It is an arithmetic number, because the mean of its divisors is an integer number (44778096).

Almost surely, 2^1212277242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212277242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432899072).

1212277242 is an abundant number, since it is smaller than the sum of its proper divisors (1653520902).

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

1212277242 is a wasteful number, since it uses less digits than its factorization.

1212277242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25203.

The product of its digits is 6272, while the sum is 30.

The square root of 1212277242 is about 34817.7719275660. The cubic root of 1212277242 is about 1066.2703120932.

Adding to 1212277242 its reverse (2427722121), we get a palindrome (3639999363).

The spelling of 1212277242 in words is "one billion, two hundred twelve million, two hundred seventy-seven thousand, two hundred forty-two".