1280472091 has 8 divisors (see below), whose sum is σ = 1289790464. Its totient is φ = 1271171880.

The previous prime is 1280472059. The next prime is 1280472121. The reversal of 1280472091 is 1902740821.

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 1280472091 - 2⁵ = 1280472059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280472191) 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, 157570 + ... + 165496.

It is an arithmetic number, because the mean of its divisors is an integer number (161223808).

Almost surely, 2^1280472091 is an apocalyptic number.

1280472091 is a deficient number, since it is larger than the sum of its proper divisors (9318373).

1280472091 is an equidigital number, since it uses as much as digits as its factorization.

1280472091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1280472091 is about 35783.6847040659. The cubic root of 1280472091 is about 1085.9005148272.

The spelling of 1280472091 in words is "one billion, two hundred eighty million, four hundred seventy-two thousand, ninety-one".