1242253012 has 96 divisors (see below), whose sum is σ = 2929538304. Its totient is φ = 445132800.

The previous prime is 1242253009. The next prime is 1242253013. The reversal of 1242253012 is 2103522421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242253013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1845508 + ... + 1846180.

It is an arithmetic number, because the mean of its divisors is an integer number (30516024).

Almost surely, 2^1242253012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242253012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464769152).

1242253012 is an abundant number, since it is smaller than the sum of its proper divisors (1687285292).

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

1242253012 is a wasteful number, since it uses less digits than its factorization.

1242253012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1242253012 is about 35245.6098259060. The cubic root of 1242253012 is about 1074.9873478230.

Adding to 1242253012 its reverse (2103522421), we get a palindrome (3345775433).

The spelling of 1242253012 in words is "one billion, two hundred forty-two million, two hundred fifty-three thousand, twelve".