1265283515 has 4 divisors (see below), whose sum is σ = 1518340224. Its totient is φ = 1012226808.

The previous prime is 1265283451. The next prime is 1265283571. The reversal of 1265283515 is 5153825621.

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

It is a cyclic number.

It is not a de Polignac number, because 1265283515 - 2⁶ = 1265283451 is a prime.

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, 126528347 + ... + 126528356.

It is an arithmetic number, because the mean of its divisors is an integer number (379585056).

Almost surely, 2^1265283515 is an apocalyptic number.

1265283515 is a deficient number, since it is larger than the sum of its proper divisors (253056709).

1265283515 is an equidigital number, since it uses as much as digits as its factorization.

1265283515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253056708.

The product of its digits is 72000, while the sum is 38.

The square root of 1265283515 is about 35570.8239291698. The cubic root of 1265283515 is about 1081.5898837263.

The spelling of 1265283515 in words is "one billion, two hundred sixty-five million, two hundred eighty-three thousand, five hundred fifteen".