11285021 has 4 divisors (see below), whose sum is σ = 12310944. Its totient is φ = 10259100.

The previous prime is 11285017. The next prime is 11285063. The reversal of 11285021 is 12058211.

It is a happy number.

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: 12058211 = 11 ⋅1096201.

It is a cyclic number.

It is not a de Polignac number, because 11285021 - 2² = 11285017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11284984 and 11285002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11285081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512945 + ... + 512966.

It is an arithmetic number, because the mean of its divisors is an integer number (3077736).

Almost surely, 2^11285021 is an apocalyptic number.

11285021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11285021 is a deficient number, since it is larger than the sum of its proper divisors (1025923).

11285021 is a wasteful number, since it uses less digits than its factorization.

11285021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025922.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11285021 is about 3359.3185320836. The cubic root of 11285021 is about 224.3025050361.

The spelling of 11285021 in words is "eleven million, two hundred eighty-five thousand, twenty-one".