1226981057 has 4 divisors (see below), whose sum is σ = 1227125700. Its totient is φ = 1226836416.

The previous prime is 1226981053. The next prime is 1226981059. The reversal of 1226981057 is 7501896221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1153553296 + 73427761 = 33964^2 + 8569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226981057 - 2² = 1226981053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226981053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58748 + ... + 76845.

It is an arithmetic number, because the mean of its divisors is an integer number (306781425).

Almost surely, 2^1226981057 is an apocalyptic number.

It is an amenable number.

1226981057 is a deficient number, since it is larger than the sum of its proper divisors (144643).

1226981057 is an equidigital number, since it uses as much as digits as its factorization.

1226981057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144642.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1226981057 is about 35028.2893815841. The cubic root of 1226981057 is about 1070.5639607170.

The spelling of 1226981057 in words is "one billion, two hundred twenty-six million, nine hundred eighty-one thousand, fifty-seven".