1267495949 has 2 divisors, whose sum is σ = 1267495950. Its totient is φ = 1267495948.

The previous prime is 1267495921. The next prime is 1267495951. The reversal of 1267495949 is 9495947621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265224900 + 2271049 = 35570^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267495949 - 2²⁰ = 1266447373 is a prime.

Together with 1267495951, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1267495894 and 1267495903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267495249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633747974 + 633747975.

It is an arithmetic number, because the mean of its divisors is an integer number (633747975).

Almost surely, 2^1267495949 is an apocalyptic number.

It is an amenable number.

1267495949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267495949 is an equidigital number, since it uses as much as digits as its factorization.

1267495949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 1267495949 is about 35601.9093448652. The cubic root of 1267495949 is about 1082.2199277217.

The spelling of 1267495949 in words is "one billion, two hundred sixty-seven million, four hundred ninety-five thousand, nine hundred forty-nine".