1427521 has 2 divisors, whose sum is σ = 1427522.
Its totient is φ = 1427520.
The previous prime is 1427513. The next prime is 1427539. The reversal of 1427521 is 1257241.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1166400 + 261121 = 1080^2 + 511^2
It is an emirp because it is prime and its reverse (1257241) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1427521 - 23 = 1427513 is a prime.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 1427492 and 1427501.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1427501) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713760 + 713761.
It is an arithmetic number, because the mean of its divisors is an integer number (713761).
21427521 is an apocalyptic number.
It is an amenable number.
1427521 is a deficient number, since it is larger than the sum of its proper divisors (1).
1427521 is an equidigital number, since it uses as much as digits as its factorization.
1427521 is an evil number, because the sum of its binary digits is even.
The product of its digits is 560, while the sum is 22.
The square root of 1427521 is about 1194.7891027290.
The cubic root of 1427521 is about 112.5971769402.
The spelling of 1427521 in words is "one million, four hundred twenty-seven thousand, five hundred twenty-one".