1222154260 has 24 divisors (see below), whose sum is σ = 2567373480. Its totient is φ = 488699904.

The previous prime is 1222154257. The next prime is 1222154273. The reversal of 1222154260 is 624512221.

It can be written as a sum of positive squares in 4 ways, for example, as 118984464 + 1103169796 = 10908^2 + 33214^2 .

It is a super-2 number, since 2×1222154260² = 2987322070472295200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65676 + ... + 82204.

It is an arithmetic number, because the mean of its divisors is an integer number (106973895).

Almost surely, 2^1222154260 is an apocalyptic number.

1222154260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222154260 is an abundant number, since it is smaller than the sum of its proper divisors (1345219220).

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

1222154260 is a wasteful number, since it uses less digits than its factorization.

1222154260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20235 (or 20233 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1222154260 is about 34959.3229339471. The cubic root of 1222154260 is about 1069.1582922530.

Adding to 1222154260 its reverse (624512221), we get a palindrome (1846666481).

The spelling of 1222154260 in words is "one billion, two hundred twenty-two million, one hundred fifty-four thousand, two hundred sixty".