1077521 has 6 divisors (see below), whose sum is σ = 1106166. Its totient is φ = 1049600.

The previous prime is 1077499. The next prime is 1077533. The reversal of 1077521 is 1257701.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4225 + 1073296 = 65^2 + 1036^2 .

It is not a de Polignac number, because 1077521 - 2⁶ = 1077457 is a prime.

It is a super-2 number, since 2×1077521² = 2322103010882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1077541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1361 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (184361).

2^1077521 is an apocalyptic number.

It is an amenable number.

1077521 is a deficient number, since it is larger than the sum of its proper divisors (28645).

1077521 is an frugal number, since it uses more digits than its factorization.

1077521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 1077521 is about 1038.0370898961. The cubic root of 1077521 is about 102.5199960988.

The spelling of 1077521 in words is "one million, seventy-seven thousand, five hundred twenty-one".