1265867371 has 8 divisors (see below), whose sum is σ = 1313413920. Its totient is φ = 1218580608.

The previous prime is 1265867327. The next prime is 1265867417. The reversal of 1265867371 is 1737685621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1265867371 - 2²⁷ = 1131649643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265867171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54991 + ... + 74536.

It is an arithmetic number, because the mean of its divisors is an integer number (164176740).

Almost surely, 2^1265867371 is an apocalyptic number.

1265867371 is a deficient number, since it is larger than the sum of its proper divisors (47546549).

1265867371 is a wasteful number, since it uses less digits than its factorization.

1265867371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129893.

The product of its digits is 423360, while the sum is 46.

The square root of 1265867371 is about 35579.0299333751. The cubic root of 1265867371 is about 1081.7562221077.

The spelling of 1265867371 in words is "one billion, two hundred sixty-five million, eight hundred sixty-seven thousand, three hundred seventy-one".