1263351971 has 16 divisors (see below), whose sum is σ = 1524821760. Its totient is φ = 1022505120.

The previous prime is 1263351967. The next prime is 1263351989. The reversal of 1263351971 is 1791533621.

It is not a de Polignac number, because 1263351971 - 2² = 1263351967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263351961) 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, 25361 + ... + 56301.

It is an arithmetic number, because the mean of its divisors is an integer number (95301360).

Almost surely, 2^1263351971 is an apocalyptic number.

1263351971 is a deficient number, since it is larger than the sum of its proper divisors (261469789).

1263351971 is a wasteful number, since it uses less digits than its factorization.

1263351971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31274.

The product of its digits is 34020, while the sum is 38.

The square root of 1263351971 is about 35543.6628810256. The cubic root of 1263351971 is about 1081.0392291628.

The spelling of 1263351971 in words is "one billion, two hundred sixty-three million, three hundred fifty-one thousand, nine hundred seventy-one".