1398121227 has 12 divisors (see below), whose sum is σ = 2049651240. Its totient is φ = 918168768.

The previous prime is 1398121189. The next prime is 1398121229. The reversal of 1398121227 is 7221218931.

It is not a de Polignac number, because 1398121227 - 2¹⁰ = 1398120203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1398121191 and 1398121200.

It is not an unprimeable number, because it can be changed into a prime (1398121229) 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, 1158702 + ... + 1159907.

It is an arithmetic number, because the mean of its divisors is an integer number (170804270).

Almost surely, 2^1398121227 is an apocalyptic number.

1398121227 is a deficient number, since it is larger than the sum of its proper divisors (651530013).

1398121227 is a wasteful number, since it uses less digits than its factorization.

1398121227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318682 (or 2318679 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1398121227 is about 37391.4592788246. The cubic root of 1398121227 is about 1118.1882984013.

The spelling of 1398121227 in words is "one billion, three hundred ninety-eight million, one hundred twenty-one thousand, two hundred twenty-seven".