1296472069 has 2 divisors, whose sum is σ = 1296472070. Its totient is φ = 1296472068.

The previous prime is 1296472063. The next prime is 1296472091. The reversal of 1296472069 is 9602746921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870545025 + 425927044 = 29505^2 + 20638^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296472069 - 2²⁵ = 1262917637 is a prime.

It is a super-2 number, since 2×1296472069² = 3361679651394281522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296472063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648236034 + 648236035.

It is an arithmetic number, because the mean of its divisors is an integer number (648236035).

Almost surely, 2^1296472069 is an apocalyptic number.

It is an amenable number.

1296472069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296472069 is an equidigital number, since it uses as much as digits as its factorization.

1296472069 is an evil number, because the sum of its binary digits is even.

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

The square root of 1296472069 is about 36006.5559169438. Note that the first 3 decimals coincide. The cubic root of 1296472069 is about 1090.4047171453.

The spelling of 1296472069 in words is "one billion, two hundred ninety-six million, four hundred seventy-two thousand, sixty-nine".