1265242679 has 16 divisors (see below), whose sum is σ = 1309271040. Its totient is φ = 1222028640.

The previous prime is 1265242631. The next prime is 1265242681. The reversal of 1265242679 is 9762425621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265242679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265242619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2515142 + ... + 2515644.

It is an arithmetic number, because the mean of its divisors is an integer number (81829440).

Almost surely, 2^1265242679 is an apocalyptic number.

1265242679 is a deficient number, since it is larger than the sum of its proper divisors (44028361).

1265242679 is a wasteful number, since it uses less digits than its factorization.

1265242679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150.

The product of its digits is 362880, while the sum is 44.

The square root of 1265242679 is about 35570.2499147813. The cubic root of 1265242679 is about 1081.5782477888.

The spelling of 1265242679 in words is "one billion, two hundred sixty-five million, two hundred forty-two thousand, six hundred seventy-nine".