1521441 has 6 divisors (see below), whose sum is σ = 2197650. Its totient is φ = 1014288.

The previous prime is 1521397. The next prime is 1521479. The reversal of 1521441 is 1441251.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 221841 = 1140^2 + 471^2 .

It is not a de Polignac number, because 1521441 - 2¹⁰ = 1520417 is a prime.

1521441 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1521491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84516 + ... + 84533.

It is an arithmetic number, because the mean of its divisors is an integer number (366275).

2^1521441 is an apocalyptic number.

It is an amenable number.

1521441 is a deficient number, since it is larger than the sum of its proper divisors (676209).

1521441 is a wasteful number, since it uses less digits than its factorization.

1521441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169055 (or 169052 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1521441 is about 1233.4670648218. The cubic root of 1521441 is about 115.0142641412.

Adding to 1521441 its reverse (1441251), we get a palindrome (2962692).

It can be divided in two parts, 1521 and 441, that multiplied together give a square (670761 = 819²).

The spelling of 1521441 in words is "one million, five hundred twenty-one thousand, four hundred forty-one".