1065643572 has 108 divisors (see below), whose sum is σ = 3073104384. Its totient is φ = 286513920.

The previous prime is 1065643571. The next prime is 1065643573. The reversal of 1065643572 is 2753465601.

It is an interprime number because it is at equal distance from previous prime (1065643571) and next prime (1065643573).

It is a super-2 number, since 2×1065643572² = 2271192445089838368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1065643572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065643571) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 166797 + ... + 173067.

Almost surely, 2^1065643572 is an apocalyptic number.

1065643572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1065643572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1536552192).

1065643572 is an abundant number, since it is smaller than the sum of its proper divisors (2007460812).

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

1065643572 is a wasteful number, since it uses less digits than its factorization.

1065643572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326 (or 6300 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 1065643572 is about 32644.1966052161. The cubic root of 1065643572 is about 1021.4191357383.

The spelling of 1065643572 in words is "one billion, sixty-five million, six hundred forty-three thousand, five hundred seventy-two".