1091630 has 16 divisors (see below), whose sum is σ = 1979424. Its totient is φ = 433440.

The previous prime is 1091627. The next prime is 1091633. The reversal of 1091630 is 361901.

It is an interprime number because it is at equal distance from previous prime (1091627) and next prime (1091633).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091633) 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, 1415 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (123714).

2^1091630 is an apocalyptic number.

1091630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091630 is a deficient number, since it is larger than the sum of its proper divisors (887794).

1091630 is a wasteful number, since it uses less digits than its factorization.

1091630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1091630 is about 1044.8109876911. The cubic root of 1091630 is about 102.9655208690.

The spelling of 1091630 in words is "one million, ninety-one thousand, six hundred thirty".