1265425920 has 240 divisors, whose sum is σ = 4781894832. Its totient is φ = 306708480.

The previous prime is 1265425919. The next prime is 1265425939. The reversal of 1265425920 is 295245621.

1265425920 is a `hidden beast` number, since 1 + 2 + 65 + 4 + 2 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250944 + ... + 255936.

Almost surely, 2^1265425920 is an apocalyptic number.

1265425920 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 1265425920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390947416).

1265425920 is an abundant number, since it is smaller than the sum of its proper divisors (3516468912).

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

1265425920 is a wasteful number, since it uses less digits than its factorization.

1265425920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033 (or 5014 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1265425920 is about 35572.8255835828. The cubic root of 1265425920 is about 1081.6304590934.

The spelling of 1265425920 in words is "one billion, two hundred sixty-five million, four hundred twenty-five thousand, nine hundred twenty".