1280764461 has 8 divisors (see below), whose sum is σ = 1708370784. Its totient is φ = 853500560.

The previous prime is 1280764447. The next prime is 1280764477. The reversal of 1280764461 is 1644670821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280764461 - 2¹⁵ = 1280731693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280764481) 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, 76746 + ... + 91931.

It is an arithmetic number, because the mean of its divisors is an integer number (213546348).

Almost surely, 2^1280764461 is an apocalyptic number.

It is an amenable number.

1280764461 is a deficient number, since it is larger than the sum of its proper divisors (427606323).

1280764461 is a wasteful number, since it uses less digits than its factorization.

1280764461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171211.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1280764461 is about 35787.7697125708. The cubic root of 1280764461 is about 1085.9831563715.

The spelling of 1280764461 in words is "one billion, two hundred eighty million, seven hundred sixty-four thousand, four hundred sixty-one".