1061643 has 16 divisors (see below), whose sum is σ = 1575936. Its totient is φ = 630240.

The previous prime is 1061629. The next prime is 1061647. The reversal of 1061643 is 3461601.

It is not a de Polignac number, because 1061643 - 2¹⁷ = 930571 is a prime.

It is a super-2 number, since 2×1061643² = 2254171718898, which contains 22 as substring.

1061643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1061647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446 + ... + 2052.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2^1061643 is an apocalyptic number.

1061643 is a deficient number, since it is larger than the sum of its proper divisors (514293).

1061643 is a wasteful number, since it uses less digits than its factorization.

1061643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1061643 is about 1030.3606164834. The cubic root of 1061643 is about 102.0139350435.

Multiplying 1061643 by its sum of digits (21), we get a triangular number (22294503 = T₆₆₇₇).

The spelling of 1061643 in words is "one million, sixty-one thousand, six hundred forty-three".