1225855047 has 8 divisors (see below), whose sum is σ = 1636652800. Its totient is φ = 816147000.

The previous prime is 1225855013. The next prime is 1225855049. The reversal of 1225855047 is 7405585221.

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

It is not a de Polignac number, because 1225855047 - 2¹⁸ = 1225592903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225854996 and 1225855014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225855049) 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, 269797 + ... + 274302.

It is an arithmetic number, because the mean of its divisors is an integer number (204581600).

Almost surely, 2^1225855047 is an apocalyptic number.

1225855047 is a deficient number, since it is larger than the sum of its proper divisors (410797753).

1225855047 is an equidigital number, since it uses as much as digits as its factorization.

1225855047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544853.

The product of its (nonzero) digits is 112000, while the sum is 39.

The square root of 1225855047 is about 35012.2128263839. The cubic root of 1225855047 is about 1070.2363722125.

The spelling of 1225855047 in words is "one billion, two hundred twenty-five million, eight hundred fifty-five thousand, forty-seven".