1225122747 has 8 divisors (see below), whose sum is σ = 1633659456. Its totient is φ = 816667272.

The previous prime is 1225122737. The next prime is 1225122779. The reversal of 1225122747 is 7472215221.

1225122747 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1225122747 - 2⁶ = 1225122683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225122737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43768 + ... + 66074.

It is an arithmetic number, because the mean of its divisors is an integer number (204207432).

Almost surely, 2^1225122747 is an apocalyptic number.

1225122747 is a deficient number, since it is larger than the sum of its proper divisors (408536709).

1225122747 is a wasteful number, since it uses less digits than its factorization.

1225122747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40617.

The product of its digits is 15680, while the sum is 33.

The square root of 1225122747 is about 35001.7534846470. The cubic root of 1225122747 is about 1070.0232175356.

Adding to 1225122747 its reverse (7472215221), we get a palindrome (8697337968).

The spelling of 1225122747 in words is "one billion, two hundred twenty-five million, one hundred twenty-two thousand, seven hundred forty-seven".