1081290 has 64 divisors (see below), whose sum is σ = 3133440. Its totient is φ = 233280.

The previous prime is 1081279. The next prime is 1081291. The reversal of 1081290 is 921801.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1081291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3855 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (48960).

2^1081290 is an apocalyptic number.

1081290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566720).

1081290 is an abundant number, since it is smaller than the sum of its proper divisors (2052150).

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

1081290 is a wasteful number, since it uses less digits than its factorization.

1081290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1081290 is about 1039.8509508579. The cubic root of 1081290 is about 102.6393899727.

The spelling of 1081290 in words is "one million, eighty-one thousand, two hundred ninety".