1280464161 has 4 divisors (see below), whose sum is σ = 1707285552. Its totient is φ = 853642772.

The previous prime is 1280464147. The next prime is 1280464177. The reversal of 1280464161 is 1614640821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280464161 - 2⁷ = 1280464033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280464111) 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, 213410691 + ... + 213410696.

It is an arithmetic number, because the mean of its divisors is an integer number (426821388).

Almost surely, 2^1280464161 is an apocalyptic number.

It is an amenable number.

1280464161 is a deficient number, since it is larger than the sum of its proper divisors (426821391).

1280464161 is an equidigital number, since it uses as much as digits as its factorization.

1280464161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426821390.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1280464161 is about 35783.5738992069. The cubic root of 1280464161 is about 1085.8982731517.

The spelling of 1280464161 in words is "one billion, two hundred eighty million, four hundred sixty-four thousand, one hundred sixty-one".