1225116530 has 48 divisors (see below), whose sum is σ = 2439725400. Its totient is φ = 442590720.

The previous prime is 1225116493. The next prime is 1225116539. The reversal of 1225116530 is 356115221.

It can be written as a sum of positive squares in 4 ways, for example, as 1141155961 + 83960569 = 33781^2 + 9163^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225116530.

It is not an unprimeable number, because it can be changed into a prime (1225116539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186746 + ... + 193194.

Almost surely, 2^1225116530 is an apocalyptic number.

1225116530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225116530 is a deficient number, since it is larger than the sum of its proper divisors (1214608870).

1225116530 is a wasteful number, since it uses less digits than its factorization.

1225116530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1225116530 is about 35001.6646746980. The cubic root of 1225116530 is about 1070.0214075549.

The spelling of 1225116530 in words is "one billion, two hundred twenty-five million, one hundred sixteen thousand, five hundred thirty".