1055890 has 32 divisors (see below), whose sum is σ = 2151360. Its totient is φ = 369600.

The previous prime is 1055881. The next prime is 1055893. The reversal of 1055890 is 985501.

It is a super-2 number, since 2×1055890² = 2229807384200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3025 + ... + 3355.

It is an arithmetic number, because the mean of its divisors is an integer number (67230).

2^1055890 is an apocalyptic number.

1055890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1055890 is an abundant number, since it is smaller than the sum of its proper divisors (1095470).

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

1055890 is a wasteful number, since it uses less digits than its factorization.

1055890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1055890 is about 1027.5650830969. The cubic root of 1055890 is about 101.8293314070.

It can be divided in two parts, 10558 and 90, that added together give a cube (10648 = 22³).

The spelling of 1055890 in words is "one million, fifty-five thousand, eight hundred ninety".