1399351225 has 12 divisors (see below), whose sum is σ = 1747683280. Its totient is φ = 1111424400.

The previous prime is 1399351223. The next prime is 1399351237. The reversal of 1399351225 is 5221539931.

It is not a de Polignac number, because 1399351225 - 2¹ = 1399351223 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1399351223) 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 11 ways as a sum of consecutive naturals, for example, 197871 + ... + 204820.

Almost surely, 2^1399351225 is an apocalyptic number.

It is an amenable number.

1399351225 is a deficient number, since it is larger than the sum of its proper divisors (348332055).

1399351225 is a wasteful number, since it uses less digits than its factorization.

1399351225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402840 (or 402835 counting only the distinct ones).

The product of its digits is 72900, while the sum is 40.

The square root of 1399351225 is about 37407.9032424968. The cubic root of 1399351225 is about 1118.5161112342.

It can be divided in two parts, 139 and 9351225, that added together give a square (9351364 = 3058²).

The spelling of 1399351225 in words is "one billion, three hundred ninety-nine million, three hundred fifty-one thousand, two hundred twenty-five".