1268745945 has 8 divisors (see below), whose sum is σ = 2029993536. Its totient is φ = 676664496.

The previous prime is 1268745899. The next prime is 1268745949. The reversal of 1268745945 is 5495478621.

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

It is not a de Polignac number, because 1268745945 - 2⁸ = 1268745689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1268745949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42291517 + ... + 42291546.

It is an arithmetic number, because the mean of its divisors is an integer number (253749192).

Almost surely, 2^1268745945 is an apocalyptic number.

1268745945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1268745945 is a deficient number, since it is larger than the sum of its proper divisors (761247591).

1268745945 is an equidigital number, since it uses as much as digits as its factorization.

1268745945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84583071.

The product of its digits is 2419200, while the sum is 51.

The square root of 1268745945 is about 35619.4602008509. The cubic root of 1268745945 is about 1082.5755701802.

The spelling of 1268745945 in words is "one billion, two hundred sixty-eight million, seven hundred forty-five thousand, nine hundred forty-five".