1055861 has 8 divisors (see below), whose sum is σ = 1140480. Its totient is φ = 974512.

The previous prime is 1055851. The next prime is 1055863. The reversal of 1055861 is 1685501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1055861 - 2¹⁴ = 1039477 is a prime.

It is a super-2 number, since 2×1055861² = 2229684902642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 1458.

It is an arithmetic number, because the mean of its divisors is an integer number (142560).

2^1055861 is an apocalyptic number.

It is an amenable number.

1055861 is a deficient number, since it is larger than the sum of its proper divisors (84619).

1055861 is a wasteful number, since it uses less digits than its factorization.

1055861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1055861 is about 1027.5509719717. The cubic root of 1055861 is about 101.8283991515.

The spelling of 1055861 in words is "one million, fifty-five thousand, eight hundred sixty-one".