1225511 has 8 divisors (see below), whose sum is σ = 1449120.
Its totient is φ = 1014048.
The previous prime is 1225507. The next prime is 1225517. The reversal of 1225511 is 1155221.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 1225511 - 22 = 1225507 is a prime.
It is a super-2 number, since 2×12255112 = 3003754422242, which contains 22 as substring.
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 1225511.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1225517) 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, 2816 + ... + 3221.
It is an arithmetic number, because the mean of its divisors is an integer number (181140).
21225511 is an apocalyptic number.
1225511 is a deficient number, since it is larger than the sum of its proper divisors (223609).
1225511 is an equidigital number, since it uses as much as digits as its factorization.
1225511 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6073.
The product of its digits is 100, while the sum is 17.
The square root of 1225511 is about 1107.0280032592.
The cubic root of 1225511 is about 107.0136239094.
The spelling of 1225511 in words is "one million, two hundred twenty-five thousand, five hundred eleven".