1398470121 has 24 divisors (see below), whose sum is σ = 2037526920. Its totient is φ = 924258816.

The previous prime is 1398470119. The next prime is 1398470141. The reversal of 1398470121 is 1210748931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 174240000 + 1224230121 = 13200^2 + 34989^2 .

It is not a de Polignac number, because 1398470121 - 2¹ = 1398470119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1398470141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 837075 + ... + 838743.

It is an arithmetic number, because the mean of its divisors is an integer number (84896955).

Almost surely, 2^1398470121 is an apocalyptic number.

It is an amenable number.

1398470121 is a deficient number, since it is larger than the sum of its proper divisors (639056799).

1398470121 is a wasteful number, since it uses less digits than its factorization.

1398470121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2422 counting only the distinct ones).

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

The square root of 1398470121 is about 37396.1244114948. The cubic root of 1398470121 is about 1118.2813033887.

The spelling of 1398470121 in words is "one billion, three hundred ninety-eight million, four hundred seventy thousand, one hundred twenty-one".