1226271420 has 192 divisors, whose sum is σ = 4259566080. Its totient is φ = 290304000.

The previous prime is 1226271329. The next prime is 1226271437. The reversal of 1226271420 is 241726221.

1226271420 is a `hidden beast` number, since 1 + 2 + 2 + 627 + 14 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 253020 + ... + 257820.

It is an arithmetic number, because the mean of its divisors is an integer number (22185240).

Almost surely, 2^1226271420 is an apocalyptic number.

1226271420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226271420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2129783040).

1226271420 is an abundant number, since it is smaller than the sum of its proper divisors (3033294660).

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

1226271420 is a wasteful number, since it uses less digits than its factorization.

1226271420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873 (or 4865 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1226271420 is about 35018.1584324476. The cubic root of 1226271420 is about 1070.3575303888.

Adding to 1226271420 its reverse (241726221), we get a palindrome (1467997641).

The spelling of 1226271420 in words is "one billion, two hundred twenty-six million, two hundred seventy-one thousand, four hundred twenty".