1252181 has 8 divisors (see below), whose sum is σ = 1466304. Its totient is φ = 1046880.

The previous prime is 1252177. The next prime is 1252187. The reversal of 1252181 is 1812521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252181 - 2² = 1252177 is a prime.

It is a super-2 number, since 2×1252181² = 3135914513522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (183288).

2^1252181 is an apocalyptic number.

It is an amenable number.

1252181 is a deficient number, since it is larger than the sum of its proper divisors (214123).

1252181 is an equidigital number, since it uses as much as digits as its factorization.

1252181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411.

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

The square root of 1252181 is about 1119.0089365148. The cubic root of 1252181 is about 107.7843490599.

Subtracting from 1252181 its sum of digits (20), we obtain a square (1252161 = 1119²).

The spelling of 1252181 in words is "one million, two hundred fifty-two thousand, one hundred eighty-one".