1222400545 has 8 divisors (see below), whose sum is σ = 1467103680. Its totient is φ = 977771760.

The previous prime is 1222400537. The next prime is 1222400551. The reversal of 1222400545 is 5450042221.

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

It is not a de Polignac number, because 1222400545 - 2³ = 1222400537 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 28380 + ... + 57010.

It is an arithmetic number, because the mean of its divisors is an integer number (183387960).

Almost surely, 2^1222400545 is an apocalyptic number.

It is an amenable number.

1222400545 is a deficient number, since it is larger than the sum of its proper divisors (244703135).

1222400545 is an equidigital number, since it uses as much as digits as its factorization.

1222400545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37175.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1222400545 is about 34962.8452074484. The cubic root of 1222400545 is about 1069.2301053274.

Adding to 1222400545 its reverse (5450042221), we get a palindrome (6672442766).

The spelling of 1222400545 in words is "one billion, two hundred twenty-two million, four hundred thousand, five hundred forty-five".