1231560465 has 8 divisors (see below), whose sum is σ = 1970496768. Its totient is φ = 656832240.

The previous prime is 1231560439. The next prime is 1231560481. The reversal of 1231560465 is 5640651321.

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

It is not a de Polignac number, because 1231560465 - 2⁶ = 1231560401 is a prime.

It is an unprimeable number.

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, 41052001 + ... + 41052030.

It is an arithmetic number, because the mean of its divisors is an integer number (246312096).

Almost surely, 2^1231560465 is an apocalyptic number.

1231560465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231560465 is a deficient number, since it is larger than the sum of its proper divisors (738936303).

1231560465 is an equidigital number, since it uses as much as digits as its factorization.

1231560465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82104039.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1231560465 is about 35093.5957832765. The cubic root of 1231560465 is about 1071.8941802731.

The spelling of 1231560465 in words is "one billion, two hundred thirty-one million, five hundred sixty thousand, four hundred sixty-five".