1265513 has 4 divisors (see below), whose sum is σ = 1306368. Its totient is φ = 1224660.

The previous prime is 1265503. The next prime is 1265519. The reversal of 1265513 is 3155621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3155621 = 7 ⋅450803.

It is a cyclic number.

It is not a de Polignac number, because 1265513 - 2⁶ = 1265449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1265519) 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, 20381 + ... + 20442.

It is an arithmetic number, because the mean of its divisors is an integer number (326592).

2^1265513 is an apocalyptic number.

It is an amenable number.

1265513 is a deficient number, since it is larger than the sum of its proper divisors (40855).

1265513 is an equidigital number, since it uses as much as digits as its factorization.

1265513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40854.

The product of its digits is 900, while the sum is 23.

The square root of 1265513 is about 1124.9502211209. The cubic root of 1265513 is about 108.1655269243.

The spelling of 1265513 in words is "one million, two hundred sixty-five thousand, five hundred thirteen".