1228559139 has 12 divisors (see below), whose sum is σ = 1774902376. Its totient is φ = 818893152.

The previous prime is 1228559131. The next prime is 1228559147. The reversal of 1228559139 is 9319558221.

1228559139 is a `hidden beast` number, since 1 + 2 + 28 + 5 + 591 + 39 = 666.

It is an interprime number because it is at equal distance from previous prime (1228559131) and next prime (1228559147).

It is not a de Polignac number, because 1228559139 - 2³ = 1228559131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228559094 and 1228559103.

It is not an unprimeable number, because it can be changed into a prime (1228559131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70584 + ... + 86250.

Almost surely, 2^1228559139 is an apocalyptic number.

1228559139 is a deficient number, since it is larger than the sum of its proper divisors (546343237).

1228559139 is a wasteful number, since it uses less digits than its factorization.

1228559139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24386 (or 24383 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 1228559139 is about 35050.8079650099. The cubic root of 1228559139 is about 1071.0227327938.

The spelling of 1228559139 in words is "one billion, two hundred twenty-eight million, five hundred fifty-nine thousand, one hundred thirty-nine".