1265654651 has 2 divisors, whose sum is σ = 1265654652. Its totient is φ = 1265654650.

The previous prime is 1265654567. The next prime is 1265654653. The reversal of 1265654651 is 1564565621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265654651 - 2¹⁴ = 1265638267 is a prime.

It is a Sophie Germain prime.

Together with 1265654653, 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 = 1265654599 and 1265654608.

It is not a weakly prime, because it can be changed into another prime (1265654653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632827325 + 632827326.

It is an arithmetic number, because the mean of its divisors is an integer number (632827326).

Almost surely, 2^1265654651 is an apocalyptic number.

1265654651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265654651 is an equidigital number, since it uses as much as digits as its factorization.

1265654651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The square root of 1265654651 is about 35576.0404064308. The cubic root of 1265654651 is about 1081.6956249025.

The spelling of 1265654651 in words is "one billion, two hundred sixty-five million, six hundred fifty-four thousand, six hundred fifty-one".