1265423360 has 88 divisors (see below), whose sum is σ = 3070745640. Its totient is φ = 500301824.

The previous prime is 1265423359. The next prime is 1265423371. The reversal of 1265423360 is 633245621.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 1263944704 = 1216^2 + 35552^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454292 + ... + 457068.

Almost surely, 2^1265423360 is an apocalyptic number.

1265423360 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 1265423360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535372820).

1265423360 is an abundant number, since it is smaller than the sum of its proper divisors (1805322280).

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

1265423360 is an equidigital number, since it uses as much as digits as its factorization.

1265423360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1265423360 is about 35572.7896010420. The cubic root of 1265423360 is about 1081.6297297011.

Adding to 1265423360 its reverse (633245621), we get a palindrome (1898668981).

The spelling of 1265423360 in words is "one billion, two hundred sixty-five million, four hundred twenty-three thousand, three hundred sixty".