1220265126265 has 8 divisors (see below), whose sum is σ = 1550454513480. Its totient is φ = 918787859712.

The previous prime is 1220265126211. The next prime is 1220265126317. The reversal of 1220265126265 is 5626215620221.

It can be written as a sum of positive squares in 4 ways, for example, as 84301380409 + 1135963745856 = 290347^2 + 1065816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220265126265 - 2⁹ = 1220265125753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7178030070 + ... + 7178030239.

It is an arithmetic number, because the mean of its divisors is an integer number (193806814185).

Almost surely, 2^{1220265126265} is an apocalyptic number.

It is an amenable number.

1220265126265 is a deficient number, since it is larger than the sum of its proper divisors (330189387215).

1220265126265 is a wasteful number, since it uses less digits than its factorization.

1220265126265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14356060331.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1220265126265 in words is "one trillion, two hundred twenty billion, two hundred sixty-five million, one hundred twenty-six thousand, two hundred sixty-five".