1101521 has 2 divisors, whose sum is σ = 1101522. Its totient is φ = 1101520.

The previous prime is 1101517. The next prime is 1101533. The reversal of 1101521 is 1251011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929296 + 172225 = 964^2 + 415^2 .

It is an emirp because it is prime and its reverse (1251011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101521 - 2² = 1101517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1101511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550760 + 550761.

It is an arithmetic number, because the mean of its divisors is an integer number (550761).

2^1101521 is an apocalyptic number.

It is an amenable number.

1101521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101521 is an equidigital number, since it uses as much as digits as its factorization.

1101521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1101521 is about 1049.5337059857. The cubic root of 1101521 is about 103.2755683620.

Adding to 1101521 its reverse (1251011), we get a palindrome (2352532).

The spelling of 1101521 in words is "one million, one hundred one thousand, five hundred twenty-one".