1264504420 has 12 divisors (see below), whose sum is σ = 2655459324. Its totient is φ = 505801760.

The previous prime is 1264504399. The next prime is 1264504447. The reversal of 1264504420 is 244054621.

It can be written as a sum of positive squares in 2 ways, for example, as 653722624 + 610781796 = 25568^2 + 24714^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31612591 + ... + 31612630.

It is an arithmetic number, because the mean of its divisors is an integer number (221288277).

Almost surely, 2^1264504420 is an apocalyptic number.

1264504420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264504420 is an abundant number, since it is smaller than the sum of its proper divisors (1390954904).

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

1264504420 is a wasteful number, since it uses less digits than its factorization.

1264504420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63225230 (or 63225228 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1264504420 is about 35559.8709221504. The cubic root of 1264504420 is about 1081.3678427700.

The spelling of 1264504420 in words is "one billion, two hundred sixty-four million, five hundred four thousand, four hundred twenty".