1390025025 has 18 divisors (see below), whose sum is σ = 2489689670. Its totient is φ = 741346560.

The previous prime is 1390024973. The next prime is 1390025053. The reversal of 1390025025 is 5205200931.

1390025025 is a `hidden beast` number, since 1 + 390 + 0 + 250 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 224280576 + 1165744449 = 14976^2 + 34143^2 .

It is not a de Polignac number, because 1390025025 - 2¹⁰ = 1390024001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1390025025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3088720 + ... + 3089169.

Almost surely, 2^1390025025 is an apocalyptic number.

1390025025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390025025 is a deficient number, since it is larger than the sum of its proper divisors (1099664645).

1390025025 is a wasteful number, since it uses less digits than its factorization.

1390025025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177905 (or 6177897 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1390025025 is about 37283.0393744931. The cubic root of 1390025025 is about 1116.0257273331.

Adding to 1390025025 its reverse (5205200931), we get a palindrome (6595225956).

The spelling of 1390025025 in words is "one billion, three hundred ninety million, twenty-five thousand, twenty-five".