1088021 has 4 divisors (see below), whose sum is σ = 1186944. Its totient is φ = 989100.

The previous prime is 1087987. The next prime is 1088023. The reversal of 1088021 is 1208801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1208801 = 11 ⋅109891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1088021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1087984 and 1088002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49445 + ... + 49466.

It is an arithmetic number, because the mean of its divisors is an integer number (296736).

2^1088021 is an apocalyptic number.

1088021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1088021 is a deficient number, since it is larger than the sum of its proper divisors (98923).

1088021 is an equidigital number, since it uses as much as digits as its factorization.

1088021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98922.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 1088021 is about 1043.0824511993. The cubic root of 1088021 is about 102.8519253490.

It can be divided in two parts, 10880 and 21, that added together give a palindrome (10901).

The spelling of 1088021 in words is "one million, eighty-eight thousand, twenty-one".