1226122140 has 48 divisors (see below), whose sum is σ = 3497927328. Its totient is φ = 320795904.

The previous prime is 1226122109. The next prime is 1226122159. The reversal of 1226122140 is 412216221.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 189607 + ... + 195966.

It is an arithmetic number, because the mean of its divisors is an integer number (72873486).

Almost surely, 2^1226122140 is an apocalyptic number.

1226122140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226122140 is an abundant number, since it is smaller than the sum of its proper divisors (2271805188).

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

1226122140 is a wasteful number, since it uses less digits than its factorization.

1226122140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385638 (or 385636 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1226122140 is about 35016.0269019773. The cubic root of 1226122140 is about 1070.3140953456.

Adding to 1226122140 its reverse (412216221), we get a palindrome (1638338361).

The spelling of 1226122140 in words is "one billion, two hundred twenty-six million, one hundred twenty-two thousand, one hundred forty".