1265822980 has 24 divisors (see below), whose sum is σ = 2659745088. Its totient is φ = 506040288.

The previous prime is 1265822953. The next prime is 1265822981. The reversal of 1265822980 is 892285621.

It is not an unprimeable number, because it can be changed into a prime (1265822981) 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, 19807 + ... + 54073.

It is an arithmetic number, because the mean of its divisors is an integer number (110822712).

Almost surely, 2^1265822980 is an apocalyptic number.

1265822980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265822980 is an abundant number, since it is smaller than the sum of its proper divisors (1393922108).

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

1265822980 is a wasteful number, since it uses less digits than its factorization.

1265822980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36123 (or 36121 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1265822980 is about 35578.4060913358. The cubic root of 1265822980 is about 1081.7435770753.

The spelling of 1265822980 in words is "one billion, two hundred sixty-five million, eight hundred twenty-two thousand, nine hundred eighty".