1521361 has 2 divisors, whose sum is σ = 1521362.
Its totient is φ = 1521360.
The previous prime is 1521337. The next prime is 1521371. The reversal of 1521361 is 1631251.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1500625 + 20736 = 1225^2 + 144^2
It is a cyclic number.
It is not a de Polignac number, because 1521361 - 211 = 1519313 is a prime.
It is not a weakly prime, because it can be changed into another prime (1521301) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760680 + 760681.
It is an arithmetic number, because the mean of its divisors is an integer number (760681).
21521361 is an apocalyptic number.
It is an amenable number.
1521361 is a deficient number, since it is larger than the sum of its proper divisors (1).
1521361 is an equidigital number, since it uses as much as digits as its factorization.
1521361 is an evil number, because the sum of its binary digits is even.
The product of its digits is 180, while the sum is 19.
The square root of 1521361 is about 1233.4346354793.
The cubic root of 1521361 is about 115.0122482229.
It can be divided in two parts, 1521 and 361, that multiplied together give a square (549081 = 7412).
The spelling of 1521361 in words is "one million, five hundred twenty-one thousand, three hundred sixty-one".