1167521 has 4 divisors (see below), whose sum is σ = 1171632. Its totient is φ = 1163412.

The previous prime is 1167473. The next prime is 1167539. The reversal of 1167521 is 1257611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1167521 - 2¹⁰ = 1166497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1167571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (292908).

2^1167521 is an apocalyptic number.

It is an amenable number.

1167521 is a deficient number, since it is larger than the sum of its proper divisors (4111).

1167521 is an equidigital number, since it uses as much as digits as its factorization.

1167521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110.

The product of its digits is 420, while the sum is 23.

The square root of 1167521 is about 1080.5188568461. The cubic root of 1167521 is about 105.2983502461.

The spelling of 1167521 in words is "one million, one hundred sixty-seven thousand, five hundred twenty-one".