1268036247 has 4 divisors (see below), whose sum is σ = 1690715000. Its totient is φ = 845357496.

The previous prime is 1268036191. The next prime is 1268036261. The reversal of 1268036247 is 7426308621.

It is a happy number.

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

It is not a de Polignac number, because 1268036247 - 2²⁰ = 1266987671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268036447) 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, 211339372 + ... + 211339377.

It is an arithmetic number, because the mean of its divisors is an integer number (422678750).

Almost surely, 2^1268036247 is an apocalyptic number.

1268036247 is a deficient number, since it is larger than the sum of its proper divisors (422678753).

1268036247 is an equidigital number, since it uses as much as digits as its factorization.

1268036247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422678752.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 1268036247 is about 35609.4965844787. The cubic root of 1268036247 is about 1082.3736792187.

The spelling of 1268036247 in words is "one billion, two hundred sixty-eight million, thirty-six thousand, two hundred forty-seven".