1265466240 has 384 divisors, whose sum is σ = 4633574400. Its totient is φ = 329951232.

The previous prime is 1265466197. The next prime is 1265466263. The reversal of 1265466240 is 426645621.

1265466240 is a `hidden beast` number, since 1 + 26 + 5 + 4 + 6 + 624 + 0 = 666.

1265466240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1265466195 and 1265466204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12286029 + ... + 12286131.

It is an arithmetic number, because the mean of its divisors is an integer number (12066600).

Almost surely, 2^1265466240 is an apocalyptic number.

1265466240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265466240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2316787200).

1265466240 is an abundant number, since it is smaller than the sum of its proper divisors (3368108160).

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

1265466240 is an equidigital number, since it uses as much as digits as its factorization.

1265466240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1265466240 is about 35573.3923037992. The cubic root of 1265466240 is about 1081.6419468927.

The spelling of 1265466240 in words is "one billion, two hundred sixty-five million, four hundred sixty-six thousand, two hundred forty".