1226947138 has 16 divisors (see below), whose sum is σ = 1939810680. Its totient is φ = 581142016.

The previous prime is 1226947123. The next prime is 1226947153. The reversal of 1226947138 is 8317496221.

It is an interprime number because it is at equal distance from previous prime (1226947123) and next prime (1226947153).

It can be written as a sum of positive squares in 4 ways, for example, as 1142913249 + 84033889 = 33807^2 + 9167^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1226947094 and 1226947103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196495 + ... + 202642.

Almost surely, 2^1226947138 is an apocalyptic number.

1226947138 is a deficient number, since it is larger than the sum of its proper divisors (712863542).

1226947138 is a wasteful number, since it uses less digits than its factorization.

1226947138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399221.

The product of its digits is 145152, while the sum is 43.

The square root of 1226947138 is about 35027.8052124309. The cubic root of 1226947138 is about 1070.5540956384.

The spelling of 1226947138 in words is "one billion, two hundred twenty-six million, nine hundred forty-seven thousand, one hundred thirty-eight".