1225297842 has 16 divisors (see below), whose sum is σ = 2463037632. Its totient is φ = 406358960.

The previous prime is 1225297841. The next prime is 1225297867. The reversal of 1225297842 is 2487925221.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1225297794 and 1225297803.

It is not an unprimeable number, because it can be changed into a prime (1225297841) 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, 517134 + ... + 519497.

It is an arithmetic number, because the mean of its divisors is an integer number (153939852).

Almost surely, 2^1225297842 is an apocalyptic number.

1225297842 is an abundant number, since it is smaller than the sum of its proper divisors (1237739790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225297842 is a wasteful number, since it uses less digits than its factorization.

1225297842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036833.

The product of its digits is 161280, while the sum is 42.

The square root of 1225297842 is about 35004.2546271164. The cubic root of 1225297842 is about 1070.0741911464.

The spelling of 1225297842 in words is "one billion, two hundred twenty-five million, two hundred ninety-seven thousand, eight hundred forty-two".