1268901507 has 4 divisors (see below), whose sum is σ = 1691868680. Its totient is φ = 845934336.

The previous prime is 1268901503. The next prime is 1268901509. The reversal of 1268901507 is 7051098621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1268901507 - 2² = 1268901503 is a prime.

It is a super-4 number, since 4×1268901507⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268901503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211483582 + ... + 211483587.

It is an arithmetic number, because the mean of its divisors is an integer number (422967170).

Almost surely, 2^1268901507 is an apocalyptic number.

1268901507 is a deficient number, since it is larger than the sum of its proper divisors (422967173).

1268901507 is an equidigital number, since it uses as much as digits as its factorization.

1268901507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422967172.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 1268901507 is about 35621.6437998024. The cubic root of 1268901507 is about 1082.6198135370.

The spelling of 1268901507 in words is "one billion, two hundred sixty-eight million, nine hundred one thousand, five hundred seven".