1552121 has 2 divisors, whose sum is σ = 1552122. Its totient is φ = 1552120.

The previous prime is 1552087. The next prime is 1552123. The reversal of 1552121 is 1212551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 26896 = 1235^2 + 164^2 .

It is an emirp because it is prime and its reverse (1212551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1552121 is a prime.

It is a Sophie Germain prime.

Together with 1552123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1552121.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1552123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776060 + 776061.

It is an arithmetic number, because the mean of its divisors is an integer number (776061).

2^1552121 is an apocalyptic number.

It is an amenable number.

1552121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552121 is an equidigital number, since it uses as much as digits as its factorization.

1552121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100, while the sum is 17.

The square root of 1552121 is about 1245.8414826935. The cubic root of 1552121 is about 115.7822162299.

Adding to 1552121 its reverse (1212551), we get a palindrome (2764672).

The spelling of 1552121 in words is "one million, five hundred fifty-two thousand, one hundred twenty-one".