1280960111 has 4 divisors (see below), whose sum is σ = 1287031224. Its totient is φ = 1274889000.

The previous prime is 1280960101. The next prime is 1280960117. The reversal of 1280960111 is 1110690821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280960111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280960117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035240 + ... + 3035661.

It is an arithmetic number, because the mean of its divisors is an integer number (321757806).

Almost surely, 2^1280960111 is an apocalyptic number.

1280960111 is a deficient number, since it is larger than the sum of its proper divisors (6071113).

1280960111 is an equidigital number, since it uses as much as digits as its factorization.

1280960111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071112.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 1280960111 is about 35790.5030839188. The cubic root of 1280960111 is about 1086.0384519372.

The spelling of 1280960111 in words is "one billion, two hundred eighty million, nine hundred sixty thousand, one hundred eleven".