1268490651 has 8 divisors (see below), whose sum is σ = 1691496960. Its totient is φ = 845572392.

The previous prime is 1268490623. The next prime is 1268490659. The reversal of 1268490651 is 1560948621.

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

It is a de Polignac number, because none of the positive numbers 2^k-1268490651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1268490659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27546 + ... + 57408.

It is an arithmetic number, because the mean of its divisors is an integer number (211437120).

Almost surely, 2^1268490651 is an apocalyptic number.

1268490651 is a deficient number, since it is larger than the sum of its proper divisors (423006309).

1268490651 is a wasteful number, since it uses less digits than its factorization.

1268490651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44025.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 1268490651 is about 35615.8763896103. The cubic root of 1268490651 is about 1082.5029542275.

The spelling of 1268490651 in words is "one billion, two hundred sixty-eight million, four hundred ninety thousand, six hundred fifty-one".