1243141664 has 24 divisors (see below), whose sum is σ = 2526386688. Its totient is φ = 601519680.

The previous prime is 1243141663. The next prime is 1243141673. The reversal of 1243141664 is 4661413421.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1243141664.

It is not an unprimeable number, because it can be changed into a prime (1243141663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625592 + ... + 627575.

It is an arithmetic number, because the mean of its divisors is an integer number (105266112).

Almost surely, 2^1243141664 is an apocalyptic number.

It is an amenable number.

1243141664 is an abundant number, since it is smaller than the sum of its proper divisors (1283245024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243141664 is a wasteful number, since it uses less digits than its factorization.

1243141664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253208 (or 1253200 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 1243141664 is about 35258.2141351487. The cubic root of 1243141664 is about 1075.2436192769.

The spelling of 1243141664 in words is "one billion, two hundred forty-three million, one hundred forty-one thousand, six hundred sixty-four".