1265220467 has 4 divisors (see below), whose sum is σ = 1445966256. Its totient is φ = 1084474680.

The previous prime is 1265220419. The next prime is 1265220479. The reversal of 1265220467 is 7640225621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1265220467 - 2⁶ = 1265220403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265220067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90372884 + ... + 90372897.

It is an arithmetic number, because the mean of its divisors is an integer number (361491564).

Almost surely, 2^1265220467 is an apocalyptic number.

1265220467 is a deficient number, since it is larger than the sum of its proper divisors (180745789).

1265220467 is an equidigital number, since it uses as much as digits as its factorization.

1265220467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180745788.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1265220467 is about 35569.9376861979. The cubic root of 1265220467 is about 1081.5719185270.

The spelling of 1265220467 in words is "one billion, two hundred sixty-five million, two hundred twenty thousand, four hundred sixty-seven".