1268251647 has 32 divisors (see below), whose sum is σ = 1884206016. Its totient is φ = 753792000.

The previous prime is 1268251613. The next prime is 1268251657. The reversal of 1268251647 is 7461528621.

It is a happy number.

It is not a de Polignac number, because 1268251647 - 2⁶ = 1268251583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1268251599 and 1268251608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268251657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157573 + ... + 165425.

It is an arithmetic number, because the mean of its divisors is an integer number (58881438).

Almost surely, 2^1268251647 is an apocalyptic number.

1268251647 is a deficient number, since it is larger than the sum of its proper divisors (615954369).

1268251647 is a wasteful number, since it uses less digits than its factorization.

1268251647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011.

The product of its digits is 161280, while the sum is 42.

The square root of 1268251647 is about 35612.5209301448. The cubic root of 1268251647 is about 1082.4349629796.

The spelling of 1268251647 in words is "one billion, two hundred sixty-eight million, two hundred fifty-one thousand, six hundred forty-seven".