1390534065 has 24 divisors (see below), whose sum is σ = 2469049128. Its totient is φ = 723528960.

The previous prime is 1390534051. The next prime is 1390534081. The reversal of 1390534065 is 5604350931.

It can be written as a sum of positive squares in 4 ways, for example, as 174477681 + 1216056384 = 13209^2 + 34872^2 .

It is not a de Polignac number, because 1390534065 - 2⁶ = 1390534001 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 374994 + ... + 378683.

It is an arithmetic number, because the mean of its divisors is an integer number (102877047).

Almost surely, 2^1390534065 is an apocalyptic number.

1390534065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1390534065 is a deficient number, since it is larger than the sum of its proper divisors (1078515063).

1390534065 is a wasteful number, since it uses less digits than its factorization.

1390534065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753729 (or 753726 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1390534065 is about 37289.8654462576. The cubic root of 1390534065 is about 1116.1619436822.

Adding to 1390534065 its reverse (5604350931), we get a palindrome (6994884996).

The spelling of 1390534065 in words is "one billion, three hundred ninety million, five hundred thirty-four thousand, sixty-five".