1265667942 has 112 divisors (see below), whose sum is σ = 3241461312. Its totient is φ = 326728080.

The previous prime is 1265667929. The next prime is 1265667947. The reversal of 1265667942 is 2497665621.

1265667942 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1265667891 and 1265667900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265667947) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 7764753 + ... + 7764915.

Almost surely, 2^1265667942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265667942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620730656).

1265667942 is an abundant number, since it is smaller than the sum of its proper divisors (1975793370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265667942 is an frugal number, since it uses more digits than its factorization.

1265667942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 186 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 1265667942 is about 35576.2272030073. The cubic root of 1265667942 is about 1081.6994112872.

The spelling of 1265667942 in words is "one billion, two hundred sixty-five million, six hundred sixty-seven thousand, nine hundred forty-two".