1225646623 has 6 divisors (see below), whose sum is σ = 1293549864. Its totient is φ = 1161138564.

The previous prime is 1225646573. The next prime is 1225646627. The reversal of 1225646623 is 3266465221.

It is not a de Polignac number, because 1225646623 - 2²⁵ = 1192092191 is a prime.

It is a super-3 number, since 3×1225646623³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225646627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1697211 + ... + 1697932.

It is an arithmetic number, because the mean of its divisors is an integer number (215591644).

Almost surely, 2^1225646623 is an apocalyptic number.

1225646623 is a deficient number, since it is larger than the sum of its proper divisors (67903241).

1225646623 is an equidigital number, since it uses as much as digits as its factorization.

1225646623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395181 (or 3395162 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 1225646623 is about 35009.2362527376. The cubic root of 1225646623 is about 1070.1757137115.

The spelling of 1225646623 in words is "one billion, two hundred twenty-five million, six hundred forty-six thousand, six hundred twenty-three".