1267894427 has 2 divisors, whose sum is σ = 1267894428. Its totient is φ = 1267894426.

The previous prime is 1267894363. The next prime is 1267894447. The reversal of 1267894427 is 7244987621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7244987621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1267894427 - 2⁶ = 1267894363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267894447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633947213 + 633947214.

It is an arithmetic number, because the mean of its divisors is an integer number (633947214).

Almost surely, 2^1267894427 is an apocalyptic number.

1267894427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267894427 is an equidigital number, since it uses as much as digits as its factorization.

1267894427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 1267894427 is about 35607.5052060658. The cubic root of 1267894427 is about 1082.3333260194. Note that the first 4 decimals are identical.

The spelling of 1267894427 in words is "one billion, two hundred sixty-seven million, eight hundred ninety-four thousand, four hundred twenty-seven".