1280461280 has 48 divisors (see below), whose sum is σ = 3457248480. Its totient is φ = 439014912.

The previous prime is 1280461277. The next prime is 1280461297. The reversal of 1280461280 is 821640821.

It is a happy number.

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, 570515 + ... + 572754.

It is an arithmetic number, because the mean of its divisors is an integer number (72026010).

Almost surely, 2^1280461280 is an apocalyptic number.

1280461280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280461280 is an abundant number, since it is smaller than the sum of its proper divisors (2176787200).

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

1280461280 is a wasteful number, since it uses less digits than its factorization.

1280461280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143291 (or 1143283 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1280461280 is about 35783.5336432835. The cubic root of 1280461280 is about 1085.8974587399.

The spelling of 1280461280 in words is "one billion, two hundred eighty million, four hundred sixty-one thousand, two hundred eighty".