1222745378 has 16 divisors (see below), whose sum is σ = 1880484984. Its totient is φ = 595943040.

The previous prime is 1222745353. The next prime is 1222745393. The reversal of 1222745378 is 8735472221.

It can be written as a sum of positive squares in 4 ways, for example, as 1039224169 + 183521209 = 32237^2 + 13547^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 98876 + ... + 110552.

Almost surely, 2^1222745378 is an apocalyptic number.

1222745378 is a deficient number, since it is larger than the sum of its proper divisors (657739606).

1222745378 is a wasteful number, since it uses less digits than its factorization.

1222745378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12997.

The product of its digits is 188160, while the sum is 41.

The square root of 1222745378 is about 34967.7762804557. The cubic root of 1222745378 is about 1069.3306373398.

The spelling of 1222745378 in words is "one billion, two hundred twenty-two million, seven hundred forty-five thousand, three hundred seventy-eight".