1226081536 has 18 divisors (see below), whose sum is σ = 2447374202. Its totient is φ = 613040640.

The previous prime is 1226081503. The next prime is 1226081569. The reversal of 1226081536 is 6351806221.

It is an interprime number because it is at equal distance from previous prime (1226081503) and next prime (1226081569).

It can be written as a sum of positive squares in only one way, i.e., 1177862400 + 48219136 = 34320^2 + 6944^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2394435 + ... + 2394946.

Almost surely, 2^1226081536 is an apocalyptic number.

1226081536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1226081536 is a deficient number, since it is larger than the sum of its proper divisors (1221292666).

1226081536 is an frugal number, since it uses more digits than its factorization.

1226081536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789397 (or 4789383 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1226081536 is about 35015.4471055276. The cubic root of 1226081536 is about 1070.3022804506.

Adding to 1226081536 its reverse (6351806221), we get a palindrome (7577887757).

The spelling of 1226081536 in words is "one billion, two hundred twenty-six million, eighty-one thousand, five hundred thirty-six".