1245442122 has 64 divisors (see below), whose sum is σ = 2805580800. Its totient is φ = 409494960.

The previous prime is 1245442109. The next prime is 1245442147. The reversal of 1245442122 is 2212445421.

It is a happy number.

It is a super-2 number, since 2×1245442122² = 3102252158503725768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2536297 + ... + 2536787.

It is an arithmetic number, because the mean of its divisors is an integer number (43837200).

Almost surely, 2^1245442122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245442122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402790400).

1245442122 is an abundant number, since it is smaller than the sum of its proper divisors (1560138678).

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

1245442122 is a wasteful number, since it uses less digits than its factorization.

1245442122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1042 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 1245442122 is about 35290.8220646672. The cubic root of 1245442122 is about 1075.9064637025.

Adding to 1245442122 its reverse (2212445421), we get a palindrome (3457887543).

The spelling of 1245442122 in words is "one billion, two hundred forty-five million, four hundred forty-two thousand, one hundred twenty-two".