1225855173 has 16 divisors (see below), whose sum is σ = 1712880000. Its totient is φ = 778339584.

The previous prime is 1225855157. The next prime is 1225855199. The reversal of 1225855173 is 3715585221.

It is not a de Polignac number, because 1225855173 - 2⁴ = 1225855157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225855153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22048 + ... + 54201.

It is an arithmetic number, because the mean of its divisors is an integer number (107055000).

Almost surely, 2^1225855173 is an apocalyptic number.

It is an amenable number.

1225855173 is a deficient number, since it is larger than the sum of its proper divisors (487024827).

1225855173 is a wasteful number, since it uses less digits than its factorization.

1225855173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76508.

The product of its digits is 84000, while the sum is 39.

The square root of 1225855173 is about 35012.2146257560. The cubic root of 1225855173 is about 1070.2364088807.

The spelling of 1225855173 in words is "one billion, two hundred twenty-five million, eight hundred fifty-five thousand, one hundred seventy-three".