1398943025 has 18 divisors (see below), whose sum is σ = 1743462630. Its totient is φ = 1113520960.

The previous prime is 1398942991. The next prime is 1398943043. The reversal of 1398943025 is 5203498931.

It can be written as a sum of positive squares in 3 ways, for example, as 283316224 + 1115626801 = 16832^2 + 33401^2 .

It is not a de Polignac number, because 1398943025 - 2¹⁰ = 1398942001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1728821 + ... + 1729629.

It is an arithmetic number, because the mean of its divisors is an integer number (96859035).

Almost surely, 2^1398943025 is an apocalyptic number.

It is an amenable number.

1398943025 is a deficient number, since it is larger than the sum of its proper divisors (344519605).

1398943025 is an frugal number, since it uses more digits than its factorization.

1398943025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1398943025 is about 37402.4467782524. The cubic root of 1398943025 is about 1118.4073411434.

The spelling of 1398943025 in words is "one billion, three hundred ninety-eight million, nine hundred forty-three thousand, twenty-five".