1265654417 has 2 divisors, whose sum is σ = 1265654418. Its totient is φ = 1265654416.

The previous prime is 1265654347. The next prime is 1265654431. The reversal of 1265654417 is 7144565621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1137308176 + 128346241 = 33724^2 + 11329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265654417 - 2⁸ = 1265654161 is a prime.

It is a super-2 number, since 2×1265654417² = 3203762206543219778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1265654447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632827208 + 632827209.

It is an arithmetic number, because the mean of its divisors is an integer number (632827209).

Almost surely, 2^1265654417 is an apocalyptic number.

It is an amenable number.

1265654417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265654417 is an equidigital number, since it uses as much as digits as its factorization.

1265654417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 1265654417 is about 35576.0371177004. The cubic root of 1265654417 is about 1081.6955582396.

The spelling of 1265654417 in words is "one billion, two hundred sixty-five million, six hundred fifty-four thousand, four hundred seventeen".