1136021 has 4 divisors (see below), whose sum is σ = 1149792. Its totient is φ = 1122252.

The previous prime is 1135999. The next prime is 1136041. The reversal of 1136021 is 1206311.

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: 1206311 = 37 ⋅32603.

It is a cyclic number.

It is not a de Polignac number, because 1136021 - 2¹⁸ = 873877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1135987 and 1136005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1136041) 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, 6761 + ... + 6926.

It is an arithmetic number, because the mean of its divisors is an integer number (287448).

2^1136021 is an apocalyptic number.

It is an amenable number.

1136021 is a deficient number, since it is larger than the sum of its proper divisors (13771).

1136021 is an equidigital number, since it uses as much as digits as its factorization.

1136021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1136021 is about 1065.8428589619. The cubic root of 1136021 is about 104.3427118745.

The spelling of 1136021 in words is "one million, one hundred thirty-six thousand, twenty-one".