1085551 has 2 divisors, whose sum is σ = 1085552. Its totient is φ = 1085550.

The previous prime is 1085521. The next prime is 1085587. The reversal of 1085551 is 1555801.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542775 + 542776.

It is an arithmetic number, because the mean of its divisors is an integer number (542776).

2^1085551 is an apocalyptic number.

1085551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085551 is an equidigital number, since it uses as much as digits as its factorization.

1085551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1085551 is about 1041.8977876932. The cubic root of 1085551 is about 102.7740356942.

The spelling of 1085551 in words is "one million, eighty-five thousand, five hundred fifty-one".