1090161 has 12 divisors (see below), whose sum is σ = 1593540. Its totient is φ = 718080.

The previous prime is 1090153. The next prime is 1090169. The reversal of 1090161 is 1610901.

It is an interprime number because it is at equal distance from previous prime (1090153) and next prime (1090169).

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 893025 = 444^2 + 945^2 .

It is not a de Polignac number, because 1090161 - 2³ = 1090153 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121 + ... + 1481.

It is an arithmetic number, because the mean of its divisors is an integer number (132795).

2^1090161 is an apocalyptic number.

It is an amenable number.

1090161 is a deficient number, since it is larger than the sum of its proper divisors (503379).

1090161 is a wasteful number, since it uses less digits than its factorization.

1090161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1090161 is about 1044.1077530600. The cubic root of 1090161 is about 102.9193134394.

The spelling of 1090161 in words is "one million, ninety thousand, one hundred sixty-one".