1263461956 has 6 divisors (see below), whose sum is σ = 2211058430. Its totient is φ = 631730976.

The previous prime is 1263461933. The next prime is 1263461971. The reversal of 1263461956 is 6591643621.

It can be written as a sum of positive squares in only one way, i.e., 1244678400 + 18783556 = 35280^2 + 4334^2 .

It is a super-2 number, since 2×1263461956² = 3192672228518691872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157932741 + ... + 157932748.

Almost surely, 2^1263461956 is an apocalyptic number.

It is an amenable number.

1263461956 is a deficient number, since it is larger than the sum of its proper divisors (947596474).

1263461956 is a wasteful number, since it uses less digits than its factorization.

1263461956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315865493 (or 315865491 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 1263461956 is about 35545.2100289195. The cubic root of 1263461956 is about 1081.0705993199.

The spelling of 1263461956 in words is "one billion, two hundred sixty-three million, four hundred sixty-one thousand, nine hundred fifty-six".