1071644 has 12 divisors (see below), whose sum is σ = 2143344. Its totient is φ = 459264.

The previous prime is 1071643. The next prime is 1071659. The reversal of 1071644 is 4461701.

1071644 is an admirable number.

It is a super-2 number, since 2×1071644² = 2296841725472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071641) 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, 19109 + ... + 19164.

It is an arithmetic number, because the mean of its divisors is an integer number (178612).

2^1071644 is an apocalyptic number.

1071644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1071644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1071644 is a wasteful number, since it uses less digits than its factorization.

1071644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38284 (or 38282 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1071644 is about 1035.2023956696. The cubic root of 1071644 is about 102.3332684932. Note that the first 3 decimals are identical.

The spelling of 1071644 in words is "one million, seventy-one thousand, six hundred forty-four".