1222521045 has 16 divisors (see below), whose sum is σ = 1956467520. Its totient is φ = 651866624.

The previous prime is 1222521031. The next prime is 1222521101. The reversal of 1222521045 is 5401252221.

It is a cyclic number.

It is not a de Polignac number, because 1222521045 - 2⁴ = 1222521029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124402 + ... + 133868.

It is an arithmetic number, because the mean of its divisors is an integer number (122279220).

Almost surely, 2^1222521045 is an apocalyptic number.

1222521045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222521045 is a deficient number, since it is larger than the sum of its proper divisors (733946475).

1222521045 is an equidigital number, since it uses as much as digits as its factorization.

1222521045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18084.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1222521045 is about 34964.5684229049. The cubic root of 1222521045 is about 1069.2652378364.

Adding to 1222521045 its reverse (5401252221), we get a palindrome (6623773266).

The spelling of 1222521045 in words is "one billion, two hundred twenty-two million, five hundred twenty-one thousand, forty-five".