1222407545 has 8 divisors (see below), whose sum is σ = 1481413320. Its totient is φ = 968243200.

The previous prime is 1222407533. The next prime is 1222407547. The reversal of 1222407545 is 5457042221.

It can be written as a sum of positive squares in 4 ways, for example, as 302377321 + 920030224 = 17389^2 + 30332^2 .

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

It is not a de Polignac number, because 1222407545 - 2⁶ = 1222407481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1222407547) 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 7 ways as a sum of consecutive naturals, for example, 1209800 + ... + 1210809.

It is an arithmetic number, because the mean of its divisors is an integer number (185176665).

Almost surely, 2^1222407545 is an apocalyptic number.

It is an amenable number.

1222407545 is a deficient number, since it is larger than the sum of its proper divisors (259005775).

1222407545 is a wasteful number, since it uses less digits than its factorization.

1222407545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420715.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 1222407545 is about 34962.9453135745. The cubic root of 1222407545 is about 1069.2321462832.

Adding to 1222407545 its reverse (5457042221), we get a palindrome (6679449766).

The spelling of 1222407545 in words is "one billion, two hundred twenty-two million, four hundred seven thousand, five hundred forty-five".