1151521 has 4 divisors (see below), whose sum is σ = 1316032. Its totient is φ = 987012.

The previous prime is 1151519. The next prime is 1151537. The reversal of 1151521 is 1251511.

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 1151521 - 2¹ = 1151519 is a prime.

It is a super-2 number, since 2×1151521² = 2652001226882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151495 and 1151504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151581) 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 3 ways as a sum of consecutive naturals, for example, 82245 + ... + 82258.

It is an arithmetic number, because the mean of its divisors is an integer number (329008).

2^1151521 is an apocalyptic number.

It is an amenable number.

1151521 is a deficient number, since it is larger than the sum of its proper divisors (164511).

1151521 is an equidigital number, since it uses as much as digits as its factorization.

1151521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164510.

The product of its digits is 50, while the sum is 16.

The square root of 1151521 is about 1073.0894650494. The cubic root of 1151521 is about 104.8151244124.

The spelling of 1151521 in words is "one million, one hundred fifty-one thousand, five hundred twenty-one".