1264043061 has 6 divisors (see below), whose sum is σ = 1825839990. Its totient is φ = 842695368.

The previous prime is 1264043023. The next prime is 1264043071. The reversal of 1264043061 is 1603404621.

1264043061 is a `hidden beast` number, since 12 + 640 + 4 + 3 + 0 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1113490161 + 150552900 = 33369^2 + 12270^2 .

It is not a de Polignac number, because 1264043061 - 2⁷ = 1264042933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264043071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70224606 + ... + 70224623.

It is an arithmetic number, because the mean of its divisors is an integer number (304306665).

Almost surely, 2^1264043061 is an apocalyptic number.

It is an amenable number.

1264043061 is a deficient number, since it is larger than the sum of its proper divisors (561796929).

1264043061 is a wasteful number, since it uses less digits than its factorization.

1264043061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140449235 (or 140449232 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1264043061 is about 35553.3832567310. The cubic root of 1264043061 is about 1081.2363131193.

Adding to 1264043061 its reverse (1603404621), we get a palindrome (2867447682).

The spelling of 1264043061 in words is "one billion, two hundred sixty-four million, forty-three thousand, sixty-one".