1225545524 has 96 divisors (see below), whose sum is σ = 2766059520. Its totient is φ = 462920832.

The previous prime is 1225545523. The next prime is 1225545557. The reversal of 1225545524 is 4255455221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225545523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451379 + ... + 454085.

It is an arithmetic number, because the mean of its divisors is an integer number (28813120).

Almost surely, 2^1225545524 is an apocalyptic number.

1225545524 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225545524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383029760).

1225545524 is an abundant number, since it is smaller than the sum of its proper divisors (1540513996).

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

1225545524 is a wasteful number, since it uses less digits than its factorization.

1225545524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2795 counting only the distinct ones).

The product of its digits is 80000, while the sum is 35.

The square root of 1225545524 is about 35007.7923325650. The cubic root of 1225545524 is about 1070.1462879734.

The spelling of 1225545524 in words is "one billion, two hundred twenty-five million, five hundred forty-five thousand, five hundred twenty-four".