1265975167 has 4 divisors (see below), whose sum is σ = 1266696640. Its totient is φ = 1265253696.

The previous prime is 1265975143. The next prime is 1265975171. The reversal of 1265975167 is 7615795621.

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 1265975167 - 2²³ = 1257586559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265975167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265975467) 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, 358098 + ... + 361615.

It is an arithmetic number, because the mean of its divisors is an integer number (316674160).

Almost surely, 2^1265975167 is an apocalyptic number.

1265975167 is a deficient number, since it is larger than the sum of its proper divisors (721473).

1265975167 is an equidigital number, since it uses as much as digits as its factorization.

1265975167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721472.

The product of its digits is 793800, while the sum is 49.

The square root of 1265975167 is about 35580.5447822261. The cubic root of 1265975167 is about 1081.7869271896.

The spelling of 1265975167 in words is "one billion, two hundred sixty-five million, nine hundred seventy-five thousand, one hundred sixty-seven".