1225545525 has 48 divisors (see below), whose sum is σ = 2254974720. Its totient is φ = 652579200.

The previous prime is 1225545523. The next prime is 1225545557. The reversal of 1225545525 is 5255455221.

1225545525 is a `hidden beast` number, since 122 + 5 + 5 + 4 + 5 + 525 = 666.

It is not a de Polignac number, because 1225545525 - 2¹ = 1225545523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225545525.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 613929 + ... + 615921.

It is an arithmetic number, because the mean of its divisors is an integer number (46978640).

Almost surely, 2^1225545525 is an apocalyptic number.

1225545525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225545525 is a deficient number, since it is larger than the sum of its proper divisors (1029429195).

1225545525 is a wasteful number, since it uses less digits than its factorization.

1225545525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923 (or 2912 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 1225545525 is about 35007.7923468476. The cubic root of 1225545525 is about 1070.1462882645.

The spelling of 1225545525 in words is "one billion, two hundred twenty-five million, five hundred forty-five thousand, five hundred twenty-five".