1281424641 has 8 divisors (see below), whose sum is σ = 1952647104. Its totient is φ = 732242640.

The previous prime is 1281424637. The next prime is 1281424679. The reversal of 1281424641 is 1464241821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1281424641 - 2² = 1281424637 is a prime.

It is a super-2 number, since 2×1281424641² = 3284098221123957762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1281444641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30510090 + ... + 30510131.

It is an arithmetic number, because the mean of its divisors is an integer number (244080888).

Almost surely, 2^1281424641 is an apocalyptic number.

It is an amenable number.

1281424641 is a deficient number, since it is larger than the sum of its proper divisors (671222463).

1281424641 is an equidigital number, since it uses as much as digits as its factorization.

1281424641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61020231.

The product of its digits is 12288, while the sum is 33.

The square root of 1281424641 is about 35796.9920663734. The cubic root of 1281424641 is about 1086.1697171411.

The spelling of 1281424641 in words is "one billion, two hundred eighty-one million, four hundred twenty-four thousand, six hundred forty-one".