1265620260 has 48 divisors (see below), whose sum is σ = 3658056192. Its totient is φ = 326611200.

The previous prime is 1265620259. The next prime is 1265620273. The reversal of 1265620260 is 620265621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338361 + ... + 342080.

It is an arithmetic number, because the mean of its divisors is an integer number (76209504).

Almost surely, 2^1265620260 is an apocalyptic number.

1265620260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265620260 is an abundant number, since it is smaller than the sum of its proper divisors (2392435932).

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

1265620260 is a wasteful number, since it uses less digits than its factorization.

1265620260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680484 (or 680482 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1265620260 is about 35575.5570581825. The cubic root of 1265620260 is about 1081.6858273559.

Adding to 1265620260 its reverse (620265621), we get a palindrome (1885885881).

The spelling of 1265620260 in words is "one billion, two hundred sixty-five million, six hundred twenty thousand, two hundred sixty".