1147197621 has 8 divisors (see below), whose sum is σ = 1619573184. Its totient is φ = 719810240.

The previous prime is 1147197613. The next prime is 1147197643. The reversal of 1147197621 is 1267917411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1147197621 - 2³ = 1147197613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1147197621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147197721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11246985 + ... + 11247086.

It is an arithmetic number, because the mean of its divisors is an integer number (202446648).

Almost surely, 2^1147197621 is an apocalyptic number.

It is an amenable number.

1147197621 is a deficient number, since it is larger than the sum of its proper divisors (472375563).

1147197621 is a wasteful number, since it uses less digits than its factorization.

1147197621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22494091.

The product of its digits is 21168, while the sum is 39.

The square root of 1147197621 is about 33870.3058887870. The cubic root of 1147197621 is about 1046.8378397455.

The spelling of 1147197621 in words is "one billion, one hundred forty-seven million, one hundred ninety-seven thousand, six hundred twenty-one".