1197621 has 6 divisors (see below), whose sum is σ = 1729910. Its totient is φ = 798408.

The previous prime is 1197619. The next prime is 1197631. The reversal of 1197621 is 1267911.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 18225 = 1086^2 + 135^2 .

It is not a de Polignac number, because 1197621 - 2¹ = 1197619 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 (1197601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66526 + ... + 66543.

2^1197621 is an apocalyptic number.

It is an amenable number.

1197621 is a deficient number, since it is larger than the sum of its proper divisors (532289).

1197621 is a wasteful number, since it uses less digits than its factorization.

1197621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133075 (or 133072 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1197621 is about 1094.3587163266. The cubic root of 1197621 is about 106.1955864403.

The spelling of 1197621 in words is "one million, one hundred ninety-seven thousand, six hundred twenty-one".