1222545401 has 12 divisors (see below), whose sum is σ = 1535760576. Its totient is φ = 952632120.

The previous prime is 1222545397. The next prime is 1222545403. The reversal of 1222545401 is 1045452221.

It is not a de Polignac number, because 1222545401 - 2² = 1222545397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222545403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720845 + ... + 722538.

It is an arithmetic number, because the mean of its divisors is an integer number (127980048).

Almost surely, 2^1222545401 is an apocalyptic number.

1222545401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222545401 is a deficient number, since it is larger than the sum of its proper divisors (313215175).

1222545401 is a wasteful number, since it uses less digits than its factorization.

1222545401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443412 (or 1443401 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1222545401 is about 34964.9167166175. The cubic root of 1222545401 is about 1069.2723386960.

Adding to 1222545401 its reverse (1045452221), we get a palindrome (2267997622).

The spelling of 1222545401 in words is "one billion, two hundred twenty-two million, five hundred forty-five thousand, four hundred one".