11862021 has 4 divisors (see below), whose sum is σ = 15816032. Its totient is φ = 7908012.

The previous prime is 11862013. The next prime is 11862029. The reversal of 11862021 is 12026811.

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.

It is an interprime number because it is at equal distance from previous prime (11862013) and next prime (11862029).

It is not a de Polignac number, because 11862021 - 2³ = 11862013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11862029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977001 + ... + 1977006.

It is an arithmetic number, because the mean of its divisors is an integer number (3954008).

Almost surely, 2^11862021 is an apocalyptic number.

It is an amenable number.

11862021 is a deficient number, since it is larger than the sum of its proper divisors (3954011).

11862021 is an equidigital number, since it uses as much as digits as its factorization.

11862021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954010.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11862021 is about 3444.1284819240. The cubic root of 11862021 is about 228.0619829942.

Adding to 11862021 its reverse (12026811), we get a palindrome (23888832).

The spelling of 11862021 in words is "eleven million, eight hundred sixty-two thousand, twenty-one".