1225887520 has 192 divisors, whose sum is σ = 3436836480. Its totient is φ = 407347200.

The previous prime is 1225887497. The next prime is 1225887539. The reversal of 1225887520 is 257885221.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2997076 + ... + 2997484.

It is an arithmetic number, because the mean of its divisors is an integer number (17900190).

Almost surely, 2^1225887520 is an apocalyptic number.

1225887520 is a gapful number since it is divisible by the number (10) 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 1225887520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718418240).

1225887520 is an abundant number, since it is smaller than the sum of its proper divisors (2210948960).

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

1225887520 is a wasteful number, since it uses less digits than its factorization.

1225887520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 1225887520 is about 35012.6765614970. The cubic root of 1225887520 is about 1070.2458223453.

The spelling of 1225887520 in words is "one billion, two hundred twenty-five million, eight hundred eighty-seven thousand, five hundred twenty".