1972270565 has 8 divisors (see below), whose sum is σ = 2399146008. Its totient is φ = 1556202240.

The previous prime is 1972270537. The next prime is 1972270567. The reversal of 1972270565 is 5650722791.

It can be written as a sum of positive squares in 4 ways, for example, as 257730916 + 1714539649 = 16054^2 + 41407^2 .

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

It is not a de Polignac number, because 1972270565 - 2¹⁶ = 1972205029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972270567) 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 7 ways as a sum of consecutive naturals, for example, 2701376 + ... + 2702105.

It is an arithmetic number, because the mean of its divisors is an integer number (299893251).

Almost surely, 2^1972270565 is an apocalyptic number.

It is an amenable number.

1972270565 is a deficient number, since it is larger than the sum of its proper divisors (426875443).

1972270565 is an equidigital number, since it uses as much as digits as its factorization.

1972270565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5403559.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 1972270565 is about 44410.2529265484. The cubic root of 1972270565 is about 1254.0711136325.

The spelling of 1972270565 in words is "one billion, nine hundred seventy-two million, two hundred seventy thousand, five hundred sixty-five".