1461131281 has 8 divisors (see below), whose sum is σ = 1545546240. Its totient is φ = 1378456992.

The previous prime is 1461131279. The next prime is 1461131303. The reversal of 1461131281 is 1821311641.

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 1461131281 - 2¹ = 1461131279 is a prime.

It is a super-2 number, since 2×1461131281² = 4269809240633401922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1461131201) 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, 433441 + ... + 436798.

It is an arithmetic number, because the mean of its divisors is an integer number (193193280).

Almost surely, 2^1461131281 is an apocalyptic number.

It is an amenable number.

1461131281 is a deficient number, since it is larger than the sum of its proper divisors (84414959).

1461131281 is an equidigital number, since it uses as much as digits as its factorization.

1461131281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870335.

The product of its digits is 1152, while the sum is 28.

The square root of 1461131281 is about 38224.7469710396. The cubic root of 1461131281 is about 1134.7401271943.

The spelling of 1461131281 in words is "one billion, four hundred sixty-one million, one hundred thirty-one thousand, two hundred eighty-one".