1280561262 has 16 divisors (see below), whose sum is σ = 2564625360. Its totient is φ = 426269952.

The previous prime is 1280561239. The next prime is 1280561273. The reversal of 1280561262 is 2621650821.

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, 141187 + ... + 149982.

It is an arithmetic number, because the mean of its divisors is an integer number (160289085).

Almost surely, 2^1280561262 is an apocalyptic number.

1280561262 is an abundant number, since it is smaller than the sum of its proper divisors (1284064098).

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

1280561262 is a wasteful number, since it uses less digits than its factorization.

1280561262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291907.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1280561262 is about 35784.9306552353. The cubic root of 1280561262 is about 1085.9257213085.

The spelling of 1280561262 in words is "one billion, two hundred eighty million, five hundred sixty-one thousand, two hundred sixty-two".