1065211720 has 16 divisors (see below), whose sum is σ = 2396726460. Its totient is φ = 426084672.

The previous prime is 1065211711. The next prime is 1065211753. The reversal of 1065211720 is 271125601.

It can be written as a sum of positive squares in 2 ways, for example, as 1033108164 + 32103556 = 32142^2 + 5666^2 .

It is a super-2 number, since 2×1065211720² = 2269352016850716800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13315107 + ... + 13315186.

Almost surely, 2^1065211720 is an apocalyptic number.

1065211720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065211720 is an abundant number, since it is smaller than the sum of its proper divisors (1331514740).

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

1065211720 is a wasteful number, since it uses less digits than its factorization.

1065211720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26630304 (or 26630300 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1065211720 is about 32637.5814054902. The cubic root of 1065211720 is about 1021.2811404126.

It can be divided in two parts, 106521 and 1720, that added together give a square (108241 = 329²).

The spelling of 1065211720 in words is "one billion, sixty-five million, two hundred eleven thousand, seven hundred twenty".