1390425065 has 4 divisors (see below), whose sum is σ = 1668510084. Its totient is φ = 1112340048.

The previous prime is 1390425059. The next prime is 1390425067. The reversal of 1390425065 is 5605240931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 985771609 + 404653456 = 31397^2 + 20116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390425065 - 2⁸ = 1390424809 is a prime.

It is a super-2 number, since 2×1390425065² = 3866563722760508450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1390425067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139042502 + ... + 139042511.

It is an arithmetic number, because the mean of its divisors is an integer number (417127521).

Almost surely, 2^1390425065 is an apocalyptic number.

It is an amenable number.

1390425065 is a deficient number, since it is larger than the sum of its proper divisors (278085019).

1390425065 is an equidigital number, since it uses as much as digits as its factorization.

1390425065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278085018.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1390425065 is about 37288.4038945085. The cubic root of 1390425065 is about 1116.1327786695.

Adding to 1390425065 its reverse (5605240931), we get a palindrome (6995665996).

The spelling of 1390425065 in words is "one billion, three hundred ninety million, four hundred twenty-five thousand, sixty-five".