1264545078 has 32 divisors (see below), whose sum is σ = 2607152640. Its totient is φ = 408589920.

The previous prime is 1264545077. The next prime is 1264545091. The reversal of 1264545078 is 8705454621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264545077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49653 + ... + 70671.

It is an arithmetic number, because the mean of its divisors is an integer number (81473520).

Almost surely, 2^1264545078 is an apocalyptic number.

1264545078 is an abundant number, since it is smaller than the sum of its proper divisors (1342607562).

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

1264545078 is a wasteful number, since it uses less digits than its factorization.

1264545078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21332.

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 1264545078 is about 35560.4426012951. The cubic root of 1264545078 is about 1081.3794324968.

Adding to 1264545078 its reverse (8705454621), we get a palindrome (9969999699).

The spelling of 1264545078 in words is "one billion, two hundred sixty-four million, five hundred forty-five thousand, seventy-eight".