1225527648 has 48 divisors (see below), whose sum is σ = 3242373120. Its totient is φ = 405288576.

The previous prime is 1225527571. The next prime is 1225527661. The reversal of 1225527648 is 8467255221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38068 + ... + 62451.

It is an arithmetic number, because the mean of its divisors is an integer number (67549440).

Almost surely, 2^1225527648 is an apocalyptic number.

It is an amenable number.

1225527648 is an abundant number, since it is smaller than the sum of its proper divisors (2016845472).

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

1225527648 is a wasteful number, since it uses less digits than its factorization.

1225527648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100659 (or 100651 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 1225527648 is about 35007.5370170482. The cubic root of 1225527648 is about 1070.1410848407.

It can be divided in two parts, 12255 and 27648, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 1225527648 in words is "one billion, two hundred twenty-five million, five hundred twenty-seven thousand, six hundred forty-eight".