1165572 has 18 divisors (see below), whose sum is σ = 2946398. Its totient is φ = 388512.

The previous prime is 1165531. The next prime is 1165579. The reversal of 1165572 is 2755611.

1165572 is a `hidden beast` number, since 1 + 1 + 655 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 112896 = 1026^2 + 336^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1165579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16153 + ... + 16224.

2^1165572 is an apocalyptic number.

1165572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1165572 is an abundant number, since it is smaller than the sum of its proper divisors (1780826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165572 is a wasteful number, since it uses less digits than its factorization.

1165572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32387 (or 32382 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1165572 is about 1079.6165986127. The cubic root of 1165572 is about 105.2397243801.

It can be divided in two parts, 11655 and 72, that multiplied together give a triangular number (839160 = T₁₂₉₅).

The spelling of 1165572 in words is "one million, one hundred sixty-five thousand, five hundred seventy-two".