1231461505 has 8 divisors (see below), whose sum is σ = 1478181312. Its totient is φ = 984884208.

The previous prime is 1231461479. The next prime is 1231461509. The reversal of 1231461505 is 5051641321.

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 1231461505 - 2¹³ = 1231453313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231461509) 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, 15589 + ... + 52018.

It is an arithmetic number, because the mean of its divisors is an integer number (184772664).

Almost surely, 2^1231461505 is an apocalyptic number.

It is an amenable number.

1231461505 is a deficient number, since it is larger than the sum of its proper divisors (246719807).

1231461505 is an equidigital number, since it uses as much as digits as its factorization.

1231461505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71255.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1231461505 is about 35092.1858110891. The cubic root of 1231461505 is about 1071.8654694107.

The spelling of 1231461505 in words is "one billion, two hundred thirty-one million, four hundred sixty-one thousand, five hundred five".