1228500135 has 32 divisors (see below), whose sum is σ = 2192184000. Its totient is φ = 652745088.

The previous prime is 1228500131. The next prime is 1228500187. The reversal of 1228500135 is 5310058221.

It is a happy number.

1228500135 is a `hidden beast` number, since 1 + 2 + 28 + 500 + 135 = 666.

It is not a de Polignac number, because 1228500135 - 2² = 1228500131 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1228500099 and 1228500108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228500131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19401 + ... + 53229.

It is an arithmetic number, because the mean of its divisors is an integer number (68505750).

Almost surely, 2^1228500135 is an apocalyptic number.

1228500135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1228500135 is a deficient number, since it is larger than the sum of its proper divisors (963683865).

1228500135 is a wasteful number, since it uses less digits than its factorization.

1228500135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34112 (or 34106 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1228500135 is about 35049.9662624659. The cubic root of 1228500135 is about 1071.0055865192.

Adding to 1228500135 its reverse (5310058221), we get a palindrome (6538558356).

The spelling of 1228500135 in words is "one billion, two hundred twenty-eight million, five hundred thousand, one hundred thirty-five".