1220534 has 8 divisors (see below), whose sum is σ = 2092368. Its totient is φ = 523080.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220534 is 4350221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43577 + ... + 43604.

It is an arithmetic number, because the mean of its divisors is an integer number (261546).

2^1220534 is an apocalyptic number.

1220534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1220534 is a deficient number, since it is larger than the sum of its proper divisors (871834).

1220534 is an equidigital number, since it uses as much as digits as its factorization.

1220534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87190.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1220534 is about 1104.7778057148. Note that the first 3 decimals coincide. The cubic root of 1220534 is about 106.8685607648.

Adding to 1220534 its reverse (4350221), we get a palindrome (5570755).

The spelling of 1220534 in words is "one million, two hundred twenty thousand, five hundred thirty-four".