1051840 has 56 divisors (see below), whose sum is σ = 2651760. Its totient is φ = 396288.

The previous prime is 1051829. The next prime is 1051847. The reversal of 1051840 is 481501.

It is a super-2 number, since 2×1051840² = 2212734771200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1051847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994 + ... + 6166.

2^1051840 is an apocalyptic number.

1051840 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 1051840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325880).

1051840 is an abundant number, since it is smaller than the sum of its proper divisors (1599920).

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

1051840 is a wasteful number, since it uses less digits than its factorization.

1051840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1051840 is about 1025.5925116731. The cubic root of 1051840 is about 101.6989714892.

It can be divided in two parts, 1051 and 840, that added together give a triangular number (1891 = T₆₁).

The spelling of 1051840 in words is "one million, fifty-one thousand, eight hundred forty".