1264006263 has 12 divisors (see below), whose sum is σ = 1824956520. Its totient is φ = 777849696.

The previous prime is 1264006259. The next prime is 1264006277. The reversal of 1264006263 is 3626004621.

It is not a de Polignac number, because 1264006263 - 2² = 1264006259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264006263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264006243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1246048 + ... + 1247061.

It is an arithmetic number, because the mean of its divisors is an integer number (152079710).

Almost surely, 2^1264006263 is an apocalyptic number.

1264006263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1264006263 is a deficient number, since it is larger than the sum of its proper divisors (560950257).

1264006263 is a wasteful number, since it uses less digits than its factorization.

1264006263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493138 (or 2493125 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1264006263 is about 35552.8657494723. The cubic root of 1264006263 is about 1081.2258209346.

The spelling of 1264006263 in words is "one billion, two hundred sixty-four million, six thousand, two hundred sixty-three".