1263505604 has 12 divisors (see below), whose sum is σ = 2214000684. Its totient is φ = 630933984.

The previous prime is 1263505583. The next prime is 1263505613. The reversal of 1263505604 is 4065053621.

It can be written as a sum of positive squares in 2 ways, for example, as 566440000 + 697065604 = 23800^2 + 26402^2 .

It is a super-2 number, since 2×1263505604² = 3192892822678809632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201227 + ... + 207410.

It is an arithmetic number, because the mean of its divisors is an integer number (184500057).

Almost surely, 2^1263505604 is an apocalyptic number.

It is an amenable number.

1263505604 is a deficient number, since it is larger than the sum of its proper divisors (950495080).

1263505604 is a wasteful number, since it uses less digits than its factorization.

1263505604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409414 (or 409412 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1263505604 is about 35545.8240022650. The cubic root of 1263505604 is about 1081.0830481913.

The spelling of 1263505604 in words is "one billion, two hundred sixty-three million, five hundred five thousand, six hundred four".