1281642211 has 8 divisors (see below), whose sum is σ = 1326291120. Its totient is φ = 1237023648.

The previous prime is 1281642181. The next prime is 1281642221. The reversal of 1281642211 is 1122461821.

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 1281642211 - 2¹⁵ = 1281609443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281642211.

It is not an unprimeable number, because it can be changed into a prime (1281642221) 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, 108865 + ... + 120061.

It is an arithmetic number, because the mean of its divisors is an integer number (165786390).

Almost surely, 2^1281642211 is an apocalyptic number.

1281642211 is a deficient number, since it is larger than the sum of its proper divisors (44648909).

1281642211 is a wasteful number, since it uses less digits than its factorization.

1281642211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15173.

The product of its digits is 1536, while the sum is 28.

The square root of 1281642211 is about 35800.0308798750. The cubic root of 1281642211 is about 1086.2311863747.

The spelling of 1281642211 in words is "one billion, two hundred eighty-one million, six hundred forty-two thousand, two hundred eleven".