1265272949 has 2 divisors, whose sum is σ = 1265272950. Its totient is φ = 1265272948.

The previous prime is 1265272901. The next prime is 1265272951. The reversal of 1265272949 is 9492725621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037806225 + 227466724 = 32215^2 + 15082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265272949 - 2¹² = 1265268853 is a prime.

Together with 1265272951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265272969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632636474 + 632636475.

It is an arithmetic number, because the mean of its divisors is an integer number (632636475).

Almost surely, 2^1265272949 is an apocalyptic number.

It is an amenable number.

1265272949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265272949 is an equidigital number, since it uses as much as digits as its factorization.

1265272949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 1265272949 is about 35570.6754082629. The cubic root of 1265272949 is about 1081.5868730413.

The spelling of 1265272949 in words is "one billion, two hundred sixty-five million, two hundred seventy-two thousand, nine hundred forty-nine".