1071840 has 192 divisors, whose sum is σ = 4354560. Its totient is φ = 215040.

The previous prime is 1071821. The next prime is 1071841. The reversal of 1071840 is 481701.

It is a super-2 number, since 2×1071840² = 2297681971200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36946 + ... + 36974.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2^1071840 is an apocalyptic number.

1071840 is a gapful number since it is divisible by the number (10) 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 1071840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177280).

1071840 is an abundant number, since it is smaller than the sum of its proper divisors (3282720).

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

1071840 is a wasteful number, since it uses less digits than its factorization.

1071840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1071840 is about 1035.2970588194. The cubic root of 1071840 is about 102.3395069138.

1071840 divided by its sum of digits (21) gives a triangular number (51040 = T₃₁₉).

The spelling of 1071840 in words is "one million, seventy-one thousand, eight hundred forty".