1427828121 has 16 divisors (see below), whose sum is σ = 2119560000. Its totient is φ = 949968864.

The previous prime is 1427828117. The next prime is 1427828177. The reversal of 1427828121 is 1218287241.

It is a happy number.

It is not a de Polignac number, because 1427828121 - 2² = 1427828117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1427828221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39516 + ... + 66461.

It is an arithmetic number, because the mean of its divisors is an integer number (132472500).

Almost surely, 2^1427828121 is an apocalyptic number.

It is an amenable number.

1427828121 is a deficient number, since it is larger than the sum of its proper divisors (691731879).

1427828121 is a wasteful number, since it uses less digits than its factorization.

1427828121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106485 (or 106479 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 1427828121 is about 37786.6129866121. The cubic root of 1427828121 is about 1126.0525118873.

The spelling of 1427828121 in words is "one billion, four hundred twenty-seven million, eight hundred twenty-eight thousand, one hundred twenty-one".