1268921064 has 32 divisors (see below), whose sum is σ = 3173940000. Its totient is φ = 422755392.

The previous prime is 1268921057. The next prime is 1268921077. The reversal of 1268921064 is 4601298621.

It is a super-2 number, since 2×1268921064² = 3220321333325784192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37782 + ... + 62970.

It is an arithmetic number, because the mean of its divisors is an integer number (99185625).

Almost surely, 2^1268921064 is an apocalyptic number.

It is an amenable number.

1268921064 is an abundant number, since it is smaller than the sum of its proper divisors (1905018936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268921064 is a wasteful number, since it uses less digits than its factorization.

1268921064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27297 (or 27293 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1268921064 is about 35621.9183088166. The cubic root of 1268921064 is about 1082.6253754835.

The spelling of 1268921064 in words is "one billion, two hundred sixty-eight million, nine hundred twenty-one thousand, sixty-four".