1522181 has 4 divisors (see below), whose sum is σ = 1574700. Its totient is φ = 1469664.

The previous prime is 1522159. The next prime is 1522187. The reversal of 1522181 is 1812251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 504100 + 1018081 = 710^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522181 - 2¹⁴ = 1505797 is a prime.

It is a super-2 number, since 2×1522181² = 4634069993522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522187) 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, 26216 + ... + 26273.

It is an arithmetic number, because the mean of its divisors is an integer number (393675).

2^1522181 is an apocalyptic number.

It is an amenable number.

1522181 is a deficient number, since it is larger than the sum of its proper divisors (52519).

1522181 is an equidigital number, since it uses as much as digits as its factorization.

1522181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52518.

The product of its digits is 160, while the sum is 20.

The square root of 1522181 is about 1233.7669958302. The cubic root of 1522181 is about 115.0329080366.

The spelling of 1522181 in words is "one million, five hundred twenty-two thousand, one hundred eighty-one".