1107521 has 6 divisors (see below), whose sum is σ = 1139670. Its totient is φ = 1076256.

The previous prime is 1107511. The next prime is 1107523. The reversal of 1107521 is 1257011.

It can be written as a sum of positive squares in 3 ways, for example, as 846400 + 261121 = 920^2 + 511^2 .

It is not a de Polignac number, because 1107521 - 2¹⁴ = 1091137 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1107521.

It is not an unprimeable number, because it can be changed into a prime (1107523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 965 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (189945).

2^1107521 is an apocalyptic number.

It is an amenable number.

1107521 is a deficient number, since it is larger than the sum of its proper divisors (32149).

1107521 is an frugal number, since it uses more digits than its factorization.

1107521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1107521 is about 1052.3882363463. The cubic root of 1107521 is about 103.4627434031.

The spelling of 1107521 in words is "one million, one hundred seven thousand, five hundred twenty-one".