1225435616 has 24 divisors (see below), whose sum is σ = 2554493760. Its totient is φ = 576675328.

The previous prime is 1225435591. The next prime is 1225435637. The reversal of 1225435616 is 6165345221.

It is a super-2 number, since 2×1225435616² = 3003384897922598912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125776 + ... + 1126863.

It is an arithmetic number, because the mean of its divisors is an integer number (106437240).

Almost surely, 2^1225435616 is an apocalyptic number.

1225435616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1225435616 is an abundant number, since it is smaller than the sum of its proper divisors (1329058144).

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

1225435616 is a wasteful number, since it uses less digits than its factorization.

1225435616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252666 (or 2252658 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1225435616 is about 35006.2225325727. Note that the first 3 decimals coincide. The cubic root of 1225435616 is about 1070.1142964638.

The spelling of 1225435616 in words is "one billion, two hundred twenty-five million, four hundred thirty-five thousand, six hundred sixteen".