1263964004 has 6 divisors (see below), whose sum is σ = 2211937014. Its totient is φ = 631982000.

The previous prime is 1263964003. The next prime is 1263964007. The reversal of 1263964004 is 4004693621.

It can be written as a sum of positive squares in only one way, i.e., 1128288100 + 135675904 = 33590^2 + 11648^2 .

It is not an unprimeable number, because it can be changed into a prime (1263964003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157995497 + ... + 157995504.

It is an arithmetic number, because the mean of its divisors is an integer number (368656169).

Almost surely, 2^1263964004 is an apocalyptic number.

It is an amenable number.

1263964004 is a deficient number, since it is larger than the sum of its proper divisors (947973010).

1263964004 is a wasteful number, since it uses less digits than its factorization.

1263964004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315991005 (or 315991003 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1263964004 is about 35552.2714323572. The cubic root of 1263964004 is about 1081.2137714080.

The spelling of 1263964004 in words is "one billion, two hundred sixty-three million, nine hundred sixty-four thousand, four".