1264100263 has 16 divisors (see below), whose sum is σ = 1399882176. Its totient is φ = 1135383040.

The previous prime is 1264100261. The next prime is 1264100273. The reversal of 1264100263 is 3620014621.

It is not a de Polignac number, because 1264100263 - 2¹ = 1264100261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264100261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176745 + ... + 183757.

It is an arithmetic number, because the mean of its divisors is an integer number (87492636).

Almost surely, 2^1264100263 is an apocalyptic number.

1264100263 is a deficient number, since it is larger than the sum of its proper divisors (135781913).

1264100263 is a wasteful number, since it uses less digits than its factorization.

1264100263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1264100263 is about 35554.1876999039. The cubic root of 1264100263 is about 1081.2526226762.

Adding to 1264100263 its reverse (3620014621), we get a palindrome (4884114884).

The spelling of 1264100263 in words is "one billion, two hundred sixty-four million, one hundred thousand, two hundred sixty-three".