1268892442 has 4 divisors (see below), whose sum is σ = 1903338666. Its totient is φ = 634446220.

The previous prime is 1268892439. The next prime is 1268892503. The reversal of 1268892442 is 2442988621.

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

It can be written as a sum of positive squares in only one way, i.e., 1048399641 + 220492801 = 32379^2 + 14849^2 .

It is a super-2 number, since 2×1268892442² = 3220176058729446728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1268892392 and 1268892401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317223109 + ... + 317223112.

Almost surely, 2^1268892442 is an apocalyptic number.

1268892442 is a deficient number, since it is larger than the sum of its proper divisors (634446224).

1268892442 is an equidigital number, since it uses as much as digits as its factorization.

1268892442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634446223.

The product of its digits is 442368, while the sum is 46.

The square root of 1268892442 is about 35621.5165595178. The cubic root of 1268892442 is about 1082.6172354614.

The spelling of 1268892442 in words is "one billion, two hundred sixty-eight million, eight hundred ninety-two thousand, four hundred forty-two".