1197021 has 24 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 642432.

The previous prime is 1197017. The next prime is 1197029. The reversal of 1197021 is 1207911.

It is not a de Polignac number, because 1197021 - 2² = 1197017 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197029) 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 23 ways as a sum of consecutive naturals, for example, 2260 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^1197021 is an apocalyptic number.

It is an amenable number.

1197021 is a deficient number, since it is larger than the sum of its proper divisors (772899).

1197021 is a wasteful number, since it uses less digits than its factorization.

1197021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1197021 is about 1094.0845488352. The cubic root of 1197021 is about 106.1778490549.

It can be divided in two parts, 119 and 7021, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 1197021 in words is "one million, one hundred ninety-seven thousand, twenty-one".