1228210129 has 8 divisors (see below), whose sum is σ = 1239373800. Its totient is φ = 1217085696.

The previous prime is 1228210121. The next prime is 1228210163. The reversal of 1228210129 is 9210128221.

It can be written as a sum of positive squares in 4 ways, for example, as 189888400 + 1038321729 = 13780^2 + 32223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1228210129 - 2³ = 1228210121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228210097 and 1228210106.

It is not an unprimeable number, because it can be changed into a prime (1228210121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54999 + ... + 74035.

It is an arithmetic number, because the mean of its divisors is an integer number (154921725).

Almost surely, 2^1228210129 is an apocalyptic number.

It is an amenable number.

1228210129 is a deficient number, since it is larger than the sum of its proper divisors (11163671).

1228210129 is a wasteful number, since it uses less digits than its factorization.

1228210129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19619.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1228210129 is about 35045.8289814922. The cubic root of 1228210129 is about 1070.9213042086.

The spelling of 1228210129 in words is "one billion, two hundred twenty-eight million, two hundred ten thousand, one hundred twenty-nine".