1222552545 has 32 divisors (see below), whose sum is σ = 1995943680. Its totient is φ = 638826240.

The previous prime is 1222552543. The next prime is 1222552559. The reversal of 1222552545 is 5452552221.

It is a happy number.

It is not a de Polignac number, because 1222552545 - 2¹ = 1222552543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222552543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243652 + ... + 248618.

It is an arithmetic number, because the mean of its divisors is an integer number (62373240).

Almost surely, 2^1222552545 is an apocalyptic number.

1222552545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222552545 is a deficient number, since it is larger than the sum of its proper divisors (773391135).

1222552545 is a wasteful number, since it uses less digits than its factorization.

1222552545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305.

The product of its digits is 40000, while the sum is 33.

The square root of 1222552545 is about 34965.0188760138. The cubic root of 1222552545 is about 1069.2744214726.

The spelling of 1222552545 in words is "one billion, two hundred twenty-two million, five hundred fifty-two thousand, five hundred forty-five".