1061572165 has 4 divisors (see below), whose sum is σ = 1273886604. Its totient is φ = 849257728.

The previous prime is 1061572163. The next prime is 1061572177. The reversal of 1061572165 is 5612751601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 640747969 + 420824196 = 25313^2 + 20514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061572165 - 2¹ = 1061572163 is a prime.

It is a super-2 number, since 2×1061572165² = 2253870923005574450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061572165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061572163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106157212 + ... + 106157221.

It is an arithmetic number, because the mean of its divisors is an integer number (318471651).

Almost surely, 2^1061572165 is an apocalyptic number.

It is an amenable number.

1061572165 is a deficient number, since it is larger than the sum of its proper divisors (212314439).

1061572165 is an equidigital number, since it uses as much as digits as its factorization.

1061572165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212314438.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1061572165 is about 32581.7765783267. The cubic root of 1061572165 is about 1020.1166613329.

The spelling of 1061572165 in words is "one billion, sixty-one million, five hundred seventy-two thousand, one hundred sixty-five".