1269272269 has 2 divisors, whose sum is σ = 1269272270. Its totient is φ = 1269272268.

The previous prime is 1269272267. The next prime is 1269272281. The reversal of 1269272269 is 9622729621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185769225 + 83503044 = 34435^2 + 9138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1269272269 - 2¹ = 1269272267 is a prime.

It is a super-2 number, since 2×1269272269² = 3222104185704816722, which contains 22 as substring.

Together with 1269272267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1269272267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634636134 + 634636135.

It is an arithmetic number, because the mean of its divisors is an integer number (634636135).

Almost surely, 2^1269272269 is an apocalyptic number.

It is an amenable number.

1269272269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269272269 is an equidigital number, since it uses as much as digits as its factorization.

1269272269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 1269272269 is about 35626.8475871778. The cubic root of 1269272269 is about 1082.7252473044.

The spelling of 1269272269 in words is "one billion, two hundred sixty-nine million, two hundred seventy-two thousand, two hundred sixty-nine".