1225239188 has 12 divisors (see below), whose sum is σ = 2146676532. Its totient is φ = 611903040.

The previous prime is 1225239179. The next prime is 1225239221. The reversal of 1225239188 is 8819325221.

It can be written as a sum of positive squares in 2 ways, for example, as 793098244 + 432140944 = 28162^2 + 20788^2 .

It is a super-2 number, since 2×1225239188² = 3002422135621798688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 175283 + ... + 182138.

It is an arithmetic number, because the mean of its divisors is an integer number (178889711).

Almost surely, 2^1225239188 is an apocalyptic number.

It is an amenable number.

1225239188 is a deficient number, since it is larger than the sum of its proper divisors (921437344).

1225239188 is a wasteful number, since it uses less digits than its factorization.

1225239188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358282 (or 358280 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 1225239188 is about 35003.4168046492. The cubic root of 1225239188 is about 1070.0571163502.

The spelling of 1225239188 in words is "one billion, two hundred twenty-five million, two hundred thirty-nine thousand, one hundred eighty-eight".