1225238556 has 24 divisors (see below), whose sum is σ = 2861614224. Its totient is φ = 408023680.

The previous prime is 1225238533. The next prime is 1225238557. The reversal of 1225238556 is 6558325221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225238557) 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, 35385 + ... + 60848.

It is an arithmetic number, because the mean of its divisors is an integer number (119233926).

Almost surely, 2^1225238556 is an apocalyptic number.

It is an amenable number.

1225238556 is an abundant number, since it is smaller than the sum of its proper divisors (1636375668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225238556 is a wasteful number, since it uses less digits than its factorization.

1225238556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97301 (or 97299 counting only the distinct ones).

The product of its digits is 144000, while the sum is 39.

The square root of 1225238556 is about 35003.4077769579. The cubic root of 1225238556 is about 1070.0569323653.

The spelling of 1225238556 in words is "one billion, two hundred twenty-five million, two hundred thirty-eight thousand, five hundred fifty-six".