1245421122 has 64 divisors (see below), whose sum is σ = 2896570368. Its totient is φ = 352800000.

The previous prime is 1245421117. The next prime is 1245421123. The reversal of 1245421122 is 2211245421.

It is a super-2 number, since 2×1245421122² = 3102147542247477768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1245421092 and 1245421101.

It is not an unprimeable number, because it can be changed into a prime (1245421123) 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, 165747 + ... + 173097.

It is an arithmetic number, because the mean of its divisors is an integer number (45258912).

Almost surely, 2^1245421122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245421122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448285184).

1245421122 is an abundant number, since it is smaller than the sum of its proper divisors (1651149246).

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

1245421122 is a wasteful number, since it uses less digits than its factorization.

1245421122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7535.

The product of its digits is 1280, while the sum is 24.

The square root of 1245421122 is about 35290.5245356314. The cubic root of 1245421122 is about 1075.9004165427.

Adding to 1245421122 its reverse (2211245421), we get a palindrome (3456666543).

The spelling of 1245421122 in words is "one billion, two hundred forty-five million, four hundred twenty-one thousand, one hundred twenty-two".