1268578471 has 8 divisors (see below), whose sum is σ = 1348431840. Its totient is φ = 1189306368.

The previous prime is 1268578459. The next prime is 1268578477. The reversal of 1268578471 is 1748758621.

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-1268578471 is a prime.

It is a super-3 number, since 3×1268578471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268578477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140811 + ... + 149548.

It is an arithmetic number, because the mean of its divisors is an integer number (168553980).

Almost surely, 2^1268578471 is an apocalyptic number.

1268578471 is a deficient number, since it is larger than the sum of its proper divisors (79853369).

1268578471 is a wasteful number, since it uses less digits than its factorization.

1268578471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290633.

The product of its digits is 752640, while the sum is 49.

The square root of 1268578471 is about 35617.1092454174. The cubic root of 1268578471 is about 1082.5279348913.

The spelling of 1268578471 in words is "one billion, two hundred sixty-eight million, five hundred seventy-eight thousand, four hundred seventy-one".