1147621 has 2 divisors, whose sum is σ = 1147622. Its totient is φ = 1147620.

The previous prime is 1147613. The next prime is 1147637. The reversal of 1147621 is 1267411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 34596 = 1055^2 + 186^2 .

It is an emirp because it is prime and its reverse (1267411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1147621 - 2³ = 1147613 is a prime.

It is a Chen prime.

1147621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1147592 and 1147601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573810 + 573811.

It is an arithmetic number, because the mean of its divisors is an integer number (573811).

2^1147621 is an apocalyptic number.

It is an amenable number.

1147621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147621 is an equidigital number, since it uses as much as digits as its factorization.

1147621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 1147621 is about 1071.2707407560. The cubic root of 1147621 is about 104.6966604147.

The spelling of 1147621 in words is "one million, one hundred forty-seven thousand, six hundred twenty-one".