1265842365 has 16 divisors (see below), whose sum is σ = 2025815616. Its totient is φ = 674960000.

The previous prime is 1265842343. The next prime is 1265842387. The reversal of 1265842365 is 5632485621.

It is an interprime number because it is at equal distance from previous prime (1265842343) and next prime (1265842387).

It is not a de Polignac number, because 1265842365 - 2⁹ = 1265841853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90865 + ... + 103865.

It is an arithmetic number, because the mean of its divisors is an integer number (126613476).

Almost surely, 2^1265842365 is an apocalyptic number.

1265842365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265842365 is a deficient number, since it is larger than the sum of its proper divisors (759973251).

1265842365 is a wasteful number, since it uses less digits than its factorization.

1265842365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19500.

The product of its digits is 345600, while the sum is 42.

The square root of 1265842365 is about 35578.6785167746. The cubic root of 1265842365 is about 1081.7490990407.

The spelling of 1265842365 in words is "one billion, two hundred sixty-five million, eight hundred forty-two thousand, three hundred sixty-five".