7126221265 has 16 divisors (see below), whose sum is σ = 8789955408. Its totient is φ = 5543888896.

The previous prime is 7126221233. The next prime is 7126221329. The reversal of 7126221265 is 5621226217.

It can be written as a sum of positive squares in 8 ways, for example, as 1679616 + 7124541649 = 1296^2 + 84407^2 .

It is a cyclic number.

It is not a de Polignac number, because 7126221265 - 2⁵ = 7126221233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7126221265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89044 + ... + 148933.

It is an arithmetic number, because the mean of its divisors is an integer number (549372213).

Almost surely, 2^7126221265 is an apocalyptic number.

It is an amenable number.

7126221265 is a deficient number, since it is larger than the sum of its proper divisors (1663734143).

7126221265 is a wasteful number, since it uses less digits than its factorization.

7126221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238148.

The product of its digits is 20160, while the sum is 34.

The square root of 7126221265 is about 84416.9489202257. The cubic root of 7126221265 is about 1924.3605018073.

The spelling of 7126221265 in words is "seven billion, one hundred twenty-six million, two hundred twenty-one thousand, two hundred sixty-five".