1225545442 has 16 divisors (see below), whose sum is σ = 2005990272. Its totient is φ = 556912720.

The previous prime is 1225545427. The next prime is 1225545443. The reversal of 1225545442 is 2445455221.

It is a junction number, because it is equal to n+sod(n) for n = 1225545398 and 1225545407.

It is not an unprimeable number, because it can be changed into a prime (1225545443) by changing a digit.

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, 125148 + ... + 134584.

It is an arithmetic number, because the mean of its divisors is an integer number (125374392).

Almost surely, 2^1225545442 is an apocalyptic number.

1225545442 is a deficient number, since it is larger than the sum of its proper divisors (780444830).

1225545442 is a wasteful number, since it uses less digits than its factorization.

1225545442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15353.

The product of its digits is 64000, while the sum is 34.

The square root of 1225545442 is about 35007.7911613972. The cubic root of 1225545442 is about 1070.1462641060.

The spelling of 1225545442 in words is "one billion, two hundred twenty-five million, five hundred forty-five thousand, four hundred forty-two".