1026520465 has 4 divisors (see below), whose sum is σ = 1231824564. Its totient is φ = 821216368.

The previous prime is 1026520427. The next prime is 1026520531. The reversal of 1026520465 is 5640256201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5640256201 = 173 ⋅32602637.

It can be written as a sum of positive squares in 2 ways, for example, as 484748289 + 541772176 = 22017^2 + 23276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026520465 - 2¹⁵ = 1026487697 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102652042 + ... + 102652051.

It is an arithmetic number, because the mean of its divisors is an integer number (307956141).

Almost surely, 2^1026520465 is an apocalyptic number.

It is an amenable number.

1026520465 is a deficient number, since it is larger than the sum of its proper divisors (205304099).

1026520465 is an equidigital number, since it uses as much as digits as its factorization.

1026520465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205304098.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1026520465 is about 32039.3580616092. The cubic root of 1026520465 is about 1008.7631380960.

Adding to 1026520465 its reverse (5640256201), we get a palindrome (6666776666).

The spelling of 1026520465 in words is "one billion, twenty-six million, five hundred twenty thousand, four hundred sixty-five".