1225640852 has 6 divisors (see below), whose sum is σ = 2144871498. Its totient is φ = 612820424.

The previous prime is 1225640803. The next prime is 1225640863. The reversal of 1225640852 is 2580465221.

It can be written as a sum of positive squares in only one way, i.e., 1052613136 + 173027716 = 32444^2 + 13154^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153205103 + ... + 153205110.

It is an arithmetic number, because the mean of its divisors is an integer number (357478583).

Almost surely, 2^1225640852 is an apocalyptic number.

It is an amenable number.

1225640852 is a deficient number, since it is larger than the sum of its proper divisors (919230646).

1225640852 is a wasteful number, since it uses less digits than its factorization.

1225640852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306410217 (or 306410215 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 1225640852 is about 35009.1538315338. The cubic root of 1225640852 is about 1070.1740340556.

The spelling of 1225640852 in words is "one billion, two hundred twenty-five million, six hundred forty thousand, eight hundred fifty-two".