1264319523 has 18 divisors (see below), whose sum is σ = 1894708452. Its totient is φ = 842510160.

The previous prime is 1264319521. The next prime is 1264319543. The reversal of 1264319523 is 3259134621.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1264319523 is a `hidden beast` number, since 1 + 2 + 643 + 1 + 9 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 1264319523 - 2¹ = 1264319521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264319521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 553143 + ... + 555423.

Almost surely, 2^1264319523 is an apocalyptic number.

1264319523 is a deficient number, since it is larger than the sum of its proper divisors (630388929).

1264319523 is an frugal number, since it uses more digits than its factorization.

1264319523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577 (or 2284 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1264319523 is about 35557.2710285815. The cubic root of 1264319523 is about 1081.3151340005.

The spelling of 1264319523 in words is "one billion, two hundred sixty-four million, three hundred nineteen thousand, five hundred twenty-three".