1280422215 has 16 divisors (see below), whose sum is σ = 2276306400. Its totient is φ = 682891776.

The previous prime is 1280422067. The next prime is 1280422229. The reversal of 1280422215 is 5122240821.

1280422215 is a `hidden beast` number, since 1 + 28 + 0 + 422 + 215 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1280422215 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4742170 + ... + 4742439.

It is an arithmetic number, because the mean of its divisors is an integer number (142269150).

Almost surely, 2^1280422215 is an apocalyptic number.

1280422215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1280422215 is a deficient number, since it is larger than the sum of its proper divisors (995884185).

1280422215 is an equidigital number, since it uses as much as digits as its factorization.

1280422215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484623 (or 9484617 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1280422215 is about 35782.9877874948. The cubic root of 1280422215 is about 1085.8864155801.

The spelling of 1280422215 in words is "one billion, two hundred eighty million, four hundred twenty-two thousand, two hundred fifteen".