1265888670 has 16 divisors (see below), whose sum is σ = 3038132880. Its totient is φ = 337570304.

The previous prime is 1265888669. The next prime is 1265888671. The reversal of 1265888670 is 768885621.

1265888670 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1265888669) and next prime (1265888671).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265888671) 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, 21098115 + ... + 21098174.

It is an arithmetic number, because the mean of its divisors is an integer number (189883305).

Almost surely, 2^1265888670 is an apocalyptic number.

1265888670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265888670 is an abundant number, since it is smaller than the sum of its proper divisors (1772244210).

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

1265888670 is a wasteful number, since it uses less digits than its factorization.

1265888670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42196299.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The square root of 1265888670 is about 35579.3292516877. The cubic root of 1265888670 is about 1081.7622891457.

The spelling of 1265888670 in words is "one billion, two hundred sixty-five million, eight hundred eighty-eight thousand, six hundred seventy".