1263141161 has 8 divisors (see below), whose sum is σ = 1300090848. Its totient is φ = 1226484000.

The previous prime is 1263141149. The next prime is 1263141167. The reversal of 1263141161 is 1611413621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263141161 is a prime.

It is a super-2 number, since 2×1263141161² = 3191051185224855842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263141161.

It is not an unprimeable number, because it can be changed into a prime (1263141167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64355 + ... + 81656.

It is an arithmetic number, because the mean of its divisors is an integer number (162511356).

Almost surely, 2^1263141161 is an apocalyptic number.

It is an amenable number.

1263141161 is a deficient number, since it is larger than the sum of its proper divisors (36949687).

1263141161 is a wasteful number, since it uses less digits than its factorization.

1263141161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146263.

The product of its digits is 864, while the sum is 26.

The square root of 1263141161 is about 35540.6972497727. The cubic root of 1263141161 is about 1080.9790963938.

Adding to 1263141161 its reverse (1611413621), we get a palindrome (2874554782).

The spelling of 1263141161 in words is "one billion, two hundred sixty-three million, one hundred forty-one thousand, one hundred sixty-one".